0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

31

Transcript of 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

Page 1: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

����������������� �������������������������! #"$ %�&�����'�(�)�* %+,�- ."$ %�-+�0/��)0�1�

2-3547608:9!8<;=3>608@? A�8B6DCBEGFIH%6JCB478LKNMPOQ? R,S%TU35MWV0X@Y[Z%E%\B3>6*]^B_<`baNcL_<`�d�cecgf�hjilkNhbm-inc�oLm pB`�_<q�rgd�cecgf�hjilkNhbmsinceo5m oLm�rBtBcL_<dbauqgv�w�ilkuhxm-inceo5m

y&zB{}|g~e~L�7~5�j�����D{������{J���%���<�L���g�J�J�����<�I���g�=��~��[�<�B���J��zB{J���D�g{0��1���D�g�5�����[�J�e��~5���-��~B{}|<�D�[���n�������5���,�-��~��<|��B�n��{J�D�

� ����|<���g�5��~L��z����>���! ��<��¡��D�������¢���B£��<�����[���%� �¥¤§¦L¦<¨x©5ª �� !«¬zu« ¤ «­�®�¯D°J±>²<³�°

´�µ·¶¹¸<º>»�¼b¸¾½>¿$º5À�Á�ÂJÀ�Â}ÁÄÃxÅÇƶÈÀ»gÉJ¶È»BÀ�Â�Ê�ÆU¼LÂJ¿NÂJÀ�½5µWµ·Ë@É�º5¿<ÆÊPÁ�ÂJÀ�Â}Á̶ͺÄÎ}Â�½Ï¿NÂ}É}ÂÆ}ÆJ½>ÀË�ÐNÀ�Â0ÑnÉ}º>¿uÁ>ÊW¶ÒÊPº>¿¥Ó0º5ÀÐNÀ�º5¶lÂJÊW¿ÔÓ}»B¿NÉJ¶ÒÊPº>¿N½5µ·ÊW¶ÒËbÕ-¶¹¸<ÂJÀ�ÂU½>À�ÂÔÁ>Ê�ÆJº>À�Á�ÂJÀ�Â}Á=É�º5»B¿g¶ÍÂ0À[Â�Ö�½5×�Ðuµ�ÂÆ-Ó0º>»B¿NÁQ¶Íº[¸<½>Ø>ÂÔÎJÊPº>µ�º�¼�ÊPÉ�½5µ�½�ÉJ¶ÒÊWØDÊW¶ÒË�Ù¥Úu¸<º�ÎPÛJÂ}É0¶ÒÊWØbÂ0Æ�º¢ÓUº>»BÀUÁ�½5¶l½=×�ÊW¿�ÊW¿e¼�ÐuÀ�ºÍÛJÂ}ÉJ¶�½>À�ÂDÜ�Ý¢ÞßQ¶ÍºU¼LÂJ¿NÂJÀ�½5µ·Ê�àxÂ�Ó}À�º5×ᶹ¸<Â[µ·ÊW×IÊW¶ÍÂ�Á�Æ0ÂJ¶�ºnÓ[É}º5»B¿g¶ÍÂ0ÀUÂ�Ö�½5×�ÑÐNµ�Â0Æ*½>¿uÁU¶¹¸<ÂJ¿Ï½�ÐLÐNµ·Ë�¶W¸BÊ�Æ�â5¿Nº5ãsµ�Â}ÁJ¼eÂ*¶Íº[µ�½5ÀȼeÂIÁL½>¶Í½�Î}½bÆJÂ0Æ*º¢Ó!½>×IÊW¿NºQ½�ÉJÊPÁÔÆ0Â}äJ»gÂ0¿uÉ}Â1ÊW¿:º5À�Á�ÂJÀ!¶ÍºÔÂƶÒÊW×[½5¶lÂÉ}º>×I×[º5¿g¿NÂ0Æ}Æ�º¢ÓÔÁ>Ê�ÆJº5À�Á�ÂJÀ�Â}Á[ÐuÀ�º>¶ÍÂJÊW¿GÀ�Âl¼�ÊPº>¿<Æ[ÊW¿G¿u½>¶Ò»BÀ�Â0Õ�½>¿NÁ@Ýlå0ß=¶lº¥Á�ÂJ¶lÂJÀ×�ÊW¿uÂÔã)¸gÂ0¶¹¸<ÂJÀU¶¹¸<ÂJÀ�Â,½5À�Â�Á5Ê Ó}ÑÓ0Â0À�Â0¿�¶-¶ÒË�ÐgÂÆ�ºnÓ-ÐNÀ�º5¶lÂJÊW¿ÄÁ>Ê�ÆJº>À�ÁLÂ0ÀJÙ1æ)º>À�¼eÂJ¿NÂJÀ�½>µjÁ>Ê�ÆJº>À�ÁLÂ0À[ÂƶÒÊW×[½5¶ÈÊPº5¿<Õ�½Ô¿uÂ0»BÀ�½5µ�¿uÂ0¶Òã�º>À�âQÎ}½bÆJÂ}Á&ÐuÀ�Â}Á>ÊPÉJ¶lº5Àã�½bÆÔÁ�Â0ÆÊç¼5¿uÂ�Á¥½>¿NÁQ¶ÍÂ0Æ}¶ÍÂ}Á=º>¿GÁL½>¶Í½�Î0»BÊWµç¶%Ó}À�º>×áÆ0ÂJØ>Â0À�½5µNÐN»gÎJµ·ÊPÉ�ÁLº>×U½>ÊW¿èÁL½>¶Í½�Î}½>¿BâbÆI¶W¸BÀ�º>»�¼b¸Ì½Q¿Nº5¿g¶ÒÀÊWØDÊP½5µÆJÂ�½5À�É}¸eÕ�ƶl½5¶ÈÊ�ƶÒÊPÉ}½>µ�½>¿u½>µ·ËbÆÊ�ÆÔ½>¿uÁ�Á�½5¶l½�Á5ÊW×[ÂJ¿<ÆÊPº5¿N½>µçÊW¶ÈË=À�Â}Á5»gÉ0¶ÒÊPº>¿uÙ�é0¿G½�Á�Á5ÊW¶ÈÊPº5¿<Õ�ÐuÀ�Â}Á>ÊPÉJ¶lº5À}ÆsÓ0º5À[ÊPÁ�ÂJ¿g¶ÒÊ ê�ÑÉ}½>¶ÒÊPº>¿@º¢Ó�Ó0½>×IÊWµ·Ë>ÑlÆÒÐ<Â}ÉJÊ ê�É�Á5Ê�ÆJº>À�ÁLÂ0ÀIã�Â0À�ÂIÁLÂ0Ø>ÂJµ�º�ÐgÂ}Á�Î0Ë�Â�ÖL¶ÒÀ�½�ÉJ¶ÒÊW¿e¼[â>¿uº>ãsµ�Â}ÁJ¼eÂ�Ó}À�º5×áÁ�½>¶Í½�Î}½>Æ0Â0Æ&¼eÂJ¿NÂJÀ�½>¶ÍÂ}Á¶W¸BÀ�º>»�¼b¸Ì×I»Bµ·¶ÒÊ ÐNµ�ÂÔÆJÂ}ä0»gÂJ¿NÉ}ÂQ½>µ·Êç¼�¿g×UÂ0¿�¶PÆ�ºnÓÔ½,â5¿Nº>ã�¿¾Á>Ê�ÆJº>À�Á�ÂJÀ�Â}Á�ÆJÂ}äJ»gÂ0¿uÉ�ÂÔ¶lº:º>¶¹¸<ÂJÀ�¸�Êç¼b¸�µ·Ë:À�ÂJµ�½>¶ÍÂ}ÁIÐNÀ�º>ѶlÂJÊW¿<ÆJÙëæ�½5×�ÊWµçË>ÑlÆÈÐgÂ}É0Ê ê-É,ÐNÀ�Â�Á5ÊPÉ0¶Íº>À}Æ:ã�Â0À�ÂĽ5µ¬ÆJºèÊW¿g¶ÍÂÒ¼�À�½5¶lÂ}ÁG¶lºG¶lÂ0ƶÔä0»g½5µ·ÊW¶È˾º¢ÓQ¼LÂJ¿NÂJÀ�½>µ�ÐNÀ�º>¶ÍÂ0ÊW¿ìÁ>Ê�ÆJº5À�Á�ÂJÀÊPÁ�ÂJ¿g¶ÒÊ ê�É}½>¶ÒÊPº>¿ÔÓ}À�º>×�Æ»gÉ�¸Q¸�Ë�ÎJÀÊPÁ*ÐNÀ�Â�Á5ÊPÉ0¶ÒÊPº>¿ÌÆËbƶÍÂ0×�ÆJÙ�ís»B¶�º¢Ó*ÆJ½>×�ÐNµ�ÂUÉJÀ�ºbÆ}Æ*Ø>½>µçÊPÁ�½>¶ÒÊPº>¿=Ð<ÂJÀ¹Ó0º>À×U½>¿uÉ�ÂUºnÓÆJÂ0Ø>Â0À�½>µ7ÐuÀ�Â}Á>ÊPÉJ¶lº5À}ÆÔã�½bÆ�É}º>×�ÐN»B¶ÍÂ}Á!ê�À}ƶÈÕ�Ó0º>µWµ�º5ã�Â}ÁÄÎ0Ë=¶ÍÂƶÈÆUº5¿î½5¿@»B¿gÀ�ÂJµ�½5¶lÂ}Á¥ÁL½>¶Í½�Î}½bÆJÂ�º¢Ó&ÐNÀ�º5¶lÂJÊW¿<ÆUã�ÊW¶¹¸µ�º>¿�¼èÁ5Ê�ÆJº>À�ÁLÂ0À�Â}ÁèÀ�Âl¼�ÊPº>¿<Æ}ÕÔ½>¿uÁĶ¹¸<ÂϽ�Ð�Ðuµ·ÊPÉ}½>¶ÒÊPº>¿ìº¢Ó*Ó0Â0ãëÆJÂJµ�Â}É0¶ÍÂ}ÁQÐNÀ�Â�Á5ÊPÉ0¶Íº>À}Æ�¶ÍºÄ¶Òã�ºÄµ�½>ÀȼeÂ[ÐuÀ�º>¶ÍÂJÊW¿ïÁ�½5¶l½Î}½>¿�â>ÆJÜUð1Àµ ÃxÅ1Õ&É0»BÀÀ�ÂJ¿g¶Òµ·Ë�É}º>¿�¶l½5ÊW¿gÊW¿e¼:×Uº>À�Â�¶¹¸<½>¿ñÞ�ò>ÕÈò�òLòUÐuÀ�º>¶ÍÂJÊW¿QÓ}À�½D¼5×UÂJ¿g¶ÈÆÔºnÓ�â5¿Nº>ã�¿îÃDÅáƶÈÀ»gÉJ¶Ò»BÀ�ÂÕ½>¿uÁÔóNã�Ê�Æ}Æ�ô-À�º>¶ÍÂJÊW¿<Õ�¸g½>ØxÊW¿e¼�½5µ·×Uºbƶ�õ5òbÕÈòLò�ò�ÐuÀ�º>¶ÍÂJÊW¿¥ÆJÂ}ä0»gÂJ¿NÉ}Â0ÆJÙQÚu¸<ÂUºLÎ0¶Í½>ÊW¿uÂ}Á�À�ÂÆ»Bµ·¶ÈÆ-ÐNÀ�º5ØDÊPÁLÂÔÂ0ØxÊPÁ�ÂJ¿NÉ}¶W¸g½>¶�µ�º>¿e¼:Á>Ê�ÆJº>À�Á�ÂJÀ�Â}Á=À�Âl¼�ÊPº>¿<ÆÔ½>À�ÂÔÉ}º>×I×[º5¿@ÊW¿Ä¿N½5¶È»BÀ�Â0Õ�ã�ÊW¶W¸Ì½5¿èÂ0Æ}¶ÒÊW×U½>¶ÍÂ[¶W¸g½>¶�ÞLÞBö�º¢ÓU½>µWµ�¶¹¸<ÂUÀ�ÂÆÊPÁ5»gÂÆÊW¿¥¶¹¸<Â1ó�ã�Ê�Æ}Æ�ôsÀ�º>¶ÍÂ0ÊW¿ÌÁ�½5¶l½,Î�½5¿�â,Î}Â0µ�º5¿e¼Ô¶lº,Á>Ê�ÆJº>À�ÁLÂ0À�Â�Á�À�Âl¼�ÊPº>¿<Æ!º¢Ó&µ�Â0¿�¼5¶¹¸U÷Nò�º>À�¼�À�Â}½>¶ÍÂJÀJÙIÚu¸<Â&¸�Ë�Ðgº>¶¹¸<Â0ÆÊ�ƶW¸g½>¶&Á>Ê ø�ÂJÀ�ÂJ¿g¶�ÐuÀ�º>¶ÍÂJÊW¿èÁ>Ê�ÆJº>À�Á�ÂJÀU¶ÈË�ÐgÂÆÔÂ�Ö�Ê�ƶ�Ê�Æ�Æ»xÐ�Ðgº>À¶ÍÂ}Á�ÎJËÔ¸BÊç¼x¸ÌÆÒÐ<Â}ÉJÊ ê�ÉJÊW¶ÈË}ùNµ�º>ã§ÆJÂJ¿<ÆÊW¶ÒÊWØDÊW¶ÒË=À�Â0Æ}»Bµç¶PÆIºnÓ¶Èã�º�Ó0½>×IÊWµ·Ë>ÑlÆÒÐgÂ�ÉJÊ ê�É�ÐuÀ�Â}Á>ÊPÉJ¶lº5À}Æ}Õ�ÎJË�¸�Ë�ÎJÀÊPÁ�ÆËbƶlÂJ×*Æ�º5»B¶·ÐgÂ0À¹Ó0º5À×�ÊW¿�¼&¼LÂJ¿NÂJÀ�½>µN×UºDÁLÂ0µ¬Æ�º5¿�½!¶Èã�º5Ñ·Ó0½>×IÊWµ·ËI¶lÂ0ƶPÕ½>¿uÁ�Î0Ë¥Â�ÖLÊ�ƶlÂJ¿NÉ}ÂÔºnÓ*ÆÊç¼�¿gÊ ê-É�½5¿g¶s¼L½}Ð�ÆUÊW¿Äó�ã�Ê�Æ}Æ!ô-À�º>¶ÍÂJÊW¿@ØJÆJÙÔð!Àµ ÃxÅúÁ>Ê�ÆJº>À�Á�ÂJÀ�Ó}À�Â}ä0»gÂJ¿NÉJË�ÂƶÒÊW×[½5¶lÂ0Æ-Ó0º5ÀÎ}º>¶¹¸�Ó0½5×�ÊWµ·ÊPÂ0ÆJÙÔÚu¸<Â0Æ0Âjê�¿NÁ5ÊW¿e¼5ÆjÐNÀ�º5×�Ðu¶�¶¹¸<Â�¿uÂ�Â}Á�Ó0º>À&½!À�ÂJØxÊ�Æ}ÊPº5¿�ÊW¿,¶¹¸<Â&ÉJ»BÀÀ�Â0¿�¶)»B¿uÁ�ÂJÀ}ƶl½5¿NÁ>ÊW¿�¼[º¢ÓjÐuÀ�º>¶ÍÂJÊW¿Æ¶ÈÀ»gÉJ¶È»BÀ�Â,½5¿NÁ�Ó}»B¿NÉJ¶ÈÊPº5¿<Õ*½bÆÔã�ÂJµWµs½>Æ�Ó0º>À,¶W¸gÂ=Á�ÂJØbÂJµ�º}ÐNÊW¿e¼Gº¢ÓÔÊW×�ÐNÀ�º>Ø>Â�ÁÄÁ5Ê�ÆJº>À�ÁLÂ0À*ÐNÀ�Â}Á5ÊPÉ0¶Íº>À}Æ�¶¹¸<½5¶�Æn¸gº>»Bµ�Á¸<½5ØbÂ�ÊW×�Ð<º5À¶l½5¿g¶-»�Æ0Â0Æ&ÊW¿ÏÎJÊPº>¶ÍÂ�É}¸�¿uº>µ�º�¼�ËQ½�ÐLÐNµ·ÊPÉ}½5¶ÈÊPº5¿<ÆJÙ

û ü%ýIþ�ÿ��������-þ��Iý

2�608BV35M¹E���603� %603��035EgV�8<E73!8���V0X73I;=8��V�MP;� j8B60V0CBEgV�CBE%4�KB3>6��JC�V0M��W3�O��PC���3���8���H)MW8��W8��<M¹O>C��);�CBOb608<;=8��W35O>Z��W3��>S��7608<;O>C�V0C������5M¹E��@6035CBObV0MW8<E���V8GV6JCBE��0;�MWVV0M¹E��@M¹E��Ò8B6J;�C�V0MW8<E �*M¹V0X%M¹E¾CBE%4ñHj3>V!��3>35EïOb3������UV8" %608�KuM¹4%MPE��:V0X%3�H�Z%M��P4%M¹E��H#�W8NOJ\$�-8��)H�MW8��W8��<M¹O>C��%�V6DZ%ObV0Z7603���&� �608BV35M¹E��sO>C�606�,8<Z7V�;�CBE��,M¹;� j8B60V0CBE�V'�ÒZ%E�ObV0MW8<E��-M¹E%4%M�� �35E��0C�H��W3��Ò8B6(�¹M)�Ò3BSsF[E%3H)C��0M¹O* %608� j3>60V!�Ä8���V0X73��3�;=8��W35O>Z��¹3��IM+�*V0X735M¹6,�JX%C- j3�8B6/.10n4%M¹;=35E��0MW8<E%C��'�V6JZ%ObV0Z%603�&�C��, �608BV35M¹E2�V6JZ%ObV0Z76J3QCBE%4�lZ%E%ObV0M¹8<EÏC�6J3[MPEgV0M¹;¥C�V3��)�¥M¹E�V3>60V!��M¹E7354�S�3!XNZ���&uV0X734�V0Z%4���8��5 %6J8BV35M¹E6�V6JZ%ObV0Z76J3[M+��8��7 �C�6JCB;=8<Z�EgV1M¹;� j8B60V0CBE�Ob3�Ò8B6*473>3� j35E%MPE���8<Z76*Z%E%4%3>6��V0CBE%4%MPE���8���;�CBE��:H)MW8��W8��<M¹O>C�� %6J8NOb3���03��>S8 X735E C9 %608BV35M¹E§M+��M¹E§MWV���lZ%E%ObV0MW8<E�C��:�V0C�V3�&!MWV�M��=O>C����¹354<;#=�>@?BA-CED�Z� j8<EF�W8���=8��G�ÒZ�E%ObV0MW8<E�&�MWV�M��=O>C����W354

H CE;#=�>@I%JC HFKLNM7O1PRQ5SRMUT1M7VWOXV$Y[Z�\@]'\B]7S^P�_`T1M7\Bacb'Z�b(V$Oed�T1V�O-YfaF\@]g\hTiZ#jB\Bk�aFZ�O1VlV�mnbojhZ#\B]7V$pq\@]UT1M7VSRjBP�a�a�Z�Oir�d4Q']7jBV$a�ask�PRYfbojBVeT1V$jhrWp'Vet�]7V�p^\@]uT1M5V[TiV�m�T�v Sw3*X73�E%C�V0MWKB3��Ò8B6J; 8��1Cx �608BV35M¹EñM��ÔC����0Z%;=354ñV8

y

Page 2: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

X�C5KB3ÌCs�z j35O>M|{)Os}1~��E>@J�I���>@I%JCE&�CBE%4$V0X73��¹8����8��:�lZ%E%ObV0M¹8<E�&�8B6 H CE;R=�>@I%J�=�>@?��-;�&�M���C���JZ%;=354 V8îHj3¥C���8uO>M¹C�V354��MWV0X¥Z%E��È8��¹4�M¹E��U8B6:�W8����8���V0X73,�z j35O>M|{)OG.�YW�V6JZ�ObV0Z7603BS(3!X73,.�Yu�0V6JZ%ObV0Z7603�8���C* %608BV35M¹EÏM����B35E73>6JC����)�=V0C�\B35EÌV8Hj3�C� %603>603��NZ%M��0M¹V3��Ò8B64�ÒZ%E�ObV0MW8<E�S,��E�473>354�&jV0X73=O>Z7606035E�Vx�Ob35EgV6DC���478��<;�C��Ì8���;�8��W35O>Z��¹C�6[H�MW8��¹8����s�V0C�V3��UV0X%C�VMPE��È8B6D;�C�V0MW8<E���81���!M¹EÌV0X734�Ò8����W81�*M¹E��=;�CBE�E73>6��

���2�����`�4�"�������x���n�������! x¡X¢�£X¤R¢��n��¢¥�¦.-�§¡i¨ª©-¤#��¨«¤�©�¢��­¬R¤��n��¨ª�ª�1��®��X73>603îV0X732�0V3� ¯�Ò608<;°=-±�?B;#�²=���? H ��C³�I�CE;#��C:V8F.�Y��V6JZ�ObV0Z7603¾M��:Ob8<E��0M¹473>60354¯�8§M¹;� j8B60V0CBE�V¥V0X�C�VÌM¹VÏX%C��Hj3>35EÄO>C����¹354F�}V0X73/�35Ob8<E%4@X�C��)��8���V0X734�B35E73>V0M¹OÔOb8u473��%&�CBE�4x�8�4%M|´:O>Z��WV�V8¥Z�E%473>6��V0CBE�4��Ò608<; H�C��JM¹OG %6JM¹E%O>M� ��W3��V0X�C�V�V0X%M��"�� %608BV35M¹E[�Ò8��¹4%M¹E��x �608BH��W35;��ÄM+��Ob8<E��0MP473>60354 V8îHj3�8<E73:8��1V0X73[��µI6DCBE%4c¶1X%C����W35E��B3��Ô8��¥¶�8<;� �Z7V3>6· O>MW35E%Ob3��6¸ y�¹Xº S���Ew�ÒCBObV�&7CN�0M¹;� #�¹M|{�354=;=8u473���8���V0X73� �608BV35M¹E��È8��¹4�M¹E��4 %608BH#�W35;áZ��JM¹E����¹C�VV0MPOb3���V8=4%M��JOb603>V0M)�>3!V0X73� �CBOb3Ô8��sOb8<E��È8B6D;�C�V0MW8<E��1V0X�C�V!V0X73/ %6J8BV35M¹EÄO>CBEGC���JZ%;=3ÔM��1\uE781�*EÄV8�Hj3UCBEs»I2�0nX%C�6D46 %608BH��W35;¼¸ y�½-º S3!X731Z��0Z%C��uC- � �608<CBOJX=V8UV0X%3: %608BV35M¹E��Ò8��¹4%M¹E��¥ %6J8BH��W35;�M��-V8/�V0C�60V(��MWV0X�CUOb8����W35ObV0MW8<E�8��R %608BV35M¹E���8���\uE78i�*E

.�Y��V6JZ�ObV0Z7603���CBE%4ïV0X735MW6�C���8uO>M¹C�V354§CB;�M¹E%8îCBO>M¹4c�3��NZ735E%Ob3��5S¾3!X736�3���Z%35E%Ob3E0ª.�Y¿�V6JZ%ObV0Z76J3:603��PC�V0MW8<E��0X%M� ��CB;�8<E���V0X73��32�}\NE%8i�*E�����C�603�Z��0354ÄV8¥473>KB3��W8� è6JZ��W3���&735E73>6���6�ÒZ�E%ObV0MW8<E���&78B6�8BV0X73>6�;�35CBE��1V8w �60354%M¹ObV1V0X73N.�Y�0V6JZ%ObV0Z76034�Ò608<;�CB;¥M¹E78=CBO>M¹4`�3��NZ735E%Ob3��È8B6*Cw�3>V!8��-V3��V� %6J8BV35M¹E��>SÀ�0¢6JCi�ï4�M|Á�6DCBObV0MW8<Ef�Ò608<;� %6J8BV35M¹E Ob6�$�0V0C�����X%C��� %608LKNM¹4%354$V0X73Ä;=8��0V�MPE��È8B6D;�C�V0MW8<E C�Hj8<Z7V,V0X%36�0V6JZ%ObV0Z7603��

8��� %608BV35M¹E��5SÂ�}E¯�0Z%OJX<�V0Z�4%MW3���&*;¥CBEe�à �608BV35M¹E��ÏC�603 �È8<Z�E%4 V8 Hj3¾E78<E�Z�E%M)�Ò8B6J;x&1X%C5KuM¹E��ïHj8BV0X<�V6JZ%ObV0Z76J354CBE�4$4%M��08B6J473>60354¾603��<M¹8<E��>S63!X73w�V6DZ%ObV0Z760354$603��<MW8<E��*�0O>C�VV3>6�Ä$0¢6JCi�$�QOb8<X73>6035E�V�)� CBE%4[�8GC�603:8BH��3>60KB354�Sx3!X%34�M��8B6J473>6J354Ä603��<MW8<E���&)X781��3>KB3>6�&�lCBM���V8��È8B6D;U{�Äu354s�V6DZ%ObV0Z7603��ICBE%4s�08��0O>C�VV3>6GÄ$0¢6JC��%�[M¹E%Ob8<X73>6035E�V�)�BS:Å�35O>CBZ��38���V0X%3��¹CBO0\G8��sOb8<X%3>6035EgV,�0O>C�VV3>6JMPE���&R�JZ%OJXè4%M��8B6J4%3>60354Ì603��<MW8<E��¥�lCBM���V8:Ob8<E�V6JMWH)Z7V3�M¹E�V35E��0MWVª�ÄM¹E@V0X73�603��0Z��WV0MPE��C�Æ)C���>@Jz�-; H C�;���?@>@Çw±�=�È���¸ y�ÉXº &)CBE%4`�8�C�603,M¹EgKuM��0M¹H��W3�MPEÌV0X73��V6JZ�ObV0Z7603BS��E %6J3>KNMW8<Z��IC�VV35;� %V�ÔV8` �60354%M¹ObV4.�YU�V6JZ%ObV0Z%603��È608<; CB;�M¹E78ÄCBO>M¹49�3��NZ735E%Ob3�&�V0X73��3�4%M+�8B6J473>60354î8B6ÔZ%E�0

�Ò8��¹47354s �C�60V��M¹4735E�V0M|{�354@M¹E` %608BV35M¹EèOb6�$�0V0C��7�V6DZ%ObV0Z7603���X%C5KB3QHj3>35EGOb8<;� ��¹3>V3��)�@M)�<E78B60354�SËÊ�8i��3>KB3>6�&j8�KB3>6[V0X73�B35C�6���&n�3>KB3>6JC����0Z�OJX¾4%M��8B6D473>60354@6J3��<MW8<E��[X%C5KB3�Hj3>35E¾4%M��0Ob8LKB3>60354¾V8ÌHj3�603��NZ%MW60354"�Ò8B6G�lZ%E%ObV0M¹8<E�S · 3��W35ObV354¾3EÄ�0CB;� ��W3���M¹E�O��¹Z%473�V6JMW8��3� �X78��z �X�C�V3!M��8<;=3>6JC��03*MWV�H�M¹E�4%M¹E��G�*MWV0X�V6JM¹8��3Ì �X78�� �X%C�V3�¸ ¹1º &uC5KuM¹4%M¹E��*M¹V0X�H�MW8BV0M¹E`¸ ¹XÍ�º &V0X%3 · 0� j3� %V0M¹473*�*MWV0Xñ9�»IRG�3 · ¸ y�ÎXº &�;*�B8��0M¹E �*M¹V0XîCBObV0MPE²¸Ï. ¹Xº &�V8BH�CBO>Ob8î;=8��0CBM¹OQKuMW6JZ���Ð@3ÌÑ"Ò/ÓIOb8<C�V� %608BV35MPE��MWV0X M¹V�Q9¥»�R�¸ÕÔ º &�Vª��608���$��V09�»IRg��NE�V0X73>V0C��3x�*M¹V0X MWV�QV09¥»�R�¸ yEÍ�º &�CBE%4ïV0X73ÌV6 603� �603���8B6x¸ ¹�Î-º &�V0X%36�PCBO6J3� %603���8B6`¸ ¹�½Xº CBE%4cÅ&CB;¦Ê y ¸ ¹ Ô º ��MWV0XïV0X735MW6Q603��z j35ObV0MWKB3ÄY,»�RG�>S$RG���8�&�4%3>V3>6J;�M¹E%C�V0M¹8<E$8��¥ %608BV35M¹Ec�V6JZ�O�0V0Z%603¥H$�$ENZ%O��W35C�6�;�C-�<E73>V0M¹O:603��8<E%CBE�Ob3 Ð@»GÑè9,Ó,CBE%4[�0V6JZ%ObV0Z76JC���OJX%C�6DCBObV3>6JM)�5C�V0MW8<E H$� 8BV0X73>6�;=3>V0X78u4��QX%C5KB3Z�E%Ob8�KB3>60354îCB4%4%M¹V0MW8<E%C��R %608BV35M¹E��:�*MWV0Xx�lZ%E%ObV0M¹8<E%C���4%M��8B6D473>60354Ì603��<MW8<E���&�M¹E%O��PZ%4%M¹E����8<;=3�V0X%C�V�C�603,C- � �C�6035E�V�)�35E�V0MW603����è4%M��08B6J473>60354î8B6ÔZ%E��Ò8��¹47354F¸ Î & y�y & y Ô%& ¹�¹ &5.-Ö�& Í . º S�3!X73�V3>6J;w��;#=�>@?BA-CEÆ×ÇsI%;�Ø��-Æ H C H ¸ Í . º CBE%4c;#=�>@?hA�CEÆ×ÇH ?+���-J H CEJC H ¸Ï. ÉXº X%C�KB3�Hj3>35E9�0Z����B3��V354f�È8B6Ô473��JOb6JMWH�M¹E��� %6J8BV35M¹E��IV0X%C�V�C�603� )C�60V0M¹C����)�G8B6U35EgV0MW6J3��)�èZ%E��È8��¹4%354îMPEV0X%35MW6:�ÒZ�E%ObV0MW8<E%C����V0C�V3��5S

Rg �C�6JV0M¹O>Z��¹C�6����$M¹E�V3>603��V0M¹E��¾3EÄ7CB;� ��W3Ä8��[C E%C�V0M¹KB3��)�ï4�M��8B6J473>6J354[ �608BV35M¹E§M��=O>C��¹O>MPE735Z76JM¹E<Ð�¶&C�»4Ó�&�CñO>C��|0O>MPZ%;�ÙeO>C��¹;=8u4%Z��PM¹ElÐ�¶&C�Ñ9Ó�6J3��<Z��¹C�V354¯�3>6JM¹E731ÙLV0X%603>8<E%M¹E73s �X78��z �X�C�V0C��3c¸ ¹ Ö º SÂ3!X�M��� %6J8BV35M¹E Ob8<E�V0CBM¹E��ÏV0X7603>3Z�E78BH��3>60KB354 8B6,4%M��08B6J473>60354¾603��<M¹8<E���&�V0X%3w�W8<E��B3��V�8��Ú��X%M¹OJXf�z �CBE���Û ½ Ob8<E��35O>Z7V0M¹KB3:CB;�M¹E%8@CBO>M¹4���¸ y Û º S�3!X%M+��¹8<E��B3��V¥4%M+�8B6J473>60354 6J3��<MW8<E Ob8<E�V0CBM¹E��¥V0X73@H�M¹E�4%M¹E�� �0MWV3`�Ò8B66¶1C�Ñ$SÚ3!X%M����0M¹V3GX%CB4F %6J3>KNMW8<Z���)�$Hj3>35EÃ�JX78i�*EV8ÄHj3�4%M+�8B6J473>60354èH$�îMWV�4�035E��0MWV0MWKuMWVª�GV8x %608BV35C��03¥CBE%4¾V8@Hj35Ob8<;=3=603��JM��V0CBE�VUV8x %608BV35C��3¥Z� �8<E¾¶&C�Ñ H�MPE%4%0MPE��2¸ ¹�ÉXº SÔ2�608BV35C��3�4%M��B3��V0MW8<EîM��*8<E%3N�&C��è8���3��V0M¹;¥C�V0M¹E��Ï8B6J473>6[8B6U4%M��8B6J4%3>6IM¹EîC��<MWKB35E¾603��<MW8<Eè8���C� %608BV35MPE;�8��W35O>Z��W3�&��8�V0X73��3�3EÄ$ j3>6JM¹;�35EgV�-M¹;� �����V0X%C�V-V0X73�O>C��¹;=8u4%Z��¹M¹EÔH�M¹E%4%MPE��&603��<MW8<E,8��R¶&C�»§M��-E78B6J;�C��+�)�U4%M��8B6J4%3>60354CBE�4 Hj35Ob8<;=3��,8B6J473>60354 Z� j8<E H�M¹E�4%M¹E��ÏV89¶1C�Ñ$S7��Ef�B35E73>6JC���&o�Ò8B6,V0X%M+�ÔCBE%4 8BV0X%3>6�E�C�V0MWKB3��)�ñ4%M��8B6D473>603549 %6J8-0V35MPE��*8B6, %6J8BV35M¹E��Ì��MWV0XèE�C�V0MWKB3��)�@4%M��08B6J473>60354G603��<MW8<E��IM¹E�KB8��WKB354¾M¹E@H�MPE%4%M¹E���&5±���Æ)C���I%Æ|=�JNJC���Ü�;�?B>@?��-;G473� j35E%4��8<Eñ4�M��8B6J473>60¢V8-0¢8B6J473>6[V6JCBE��0M¹V0MW8<E��IC��[V0X73=E%C�V0MWKB3��)�îZ%E��Ò8��¹47354` �608BV35M¹E��G�Ò8B6J;Ý���-±¥È#Æ�CÞ$C��G�*MWV0XîV0X735MW6UOb8��<E%C�V3 )C�60V0E73>6��/¸ ¹ & ½ & Í Ö�& Í�yEº Sµ[MWKB35E:V0X%C�V�4�M��8B6J473>6J354=8B61Z%E��Ò8��¹47354=603��<M¹8<E��ß�Ò603��NZ735E�V�)�=X%C5KB3G�ÒZ�E%ObV0MW8<E�&�V0X73�8<;¥M���0MW8<E�8��5�0Z%ODX¥603��<M¹8<E���M+�

CN�3>6JM¹8<Z���473E{�O>MW35E%OE�=M¹E� �603>KNM¹8<Z���C�VV35;� �V�&V8N�8��¹KB3*V0X73G %608BV35M¹Ew�È8��P4%M¹E��/ �608BH��W35;ÄSo3!X73¥�B8<C���8���V0X73¥ �603��35E�V

¹

Page 3: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

�0V0Z%4��èM+�[V8Ä3��V0M¹;�C�V3�V0X%3�M¹;� j8B60V0CBE%Ob3Q8���MPE%O��¹Z%4%MPE��¥V0X73� �60354%M¹ObV0MW8<Eî8���8B6J473>6ÔCBE%4ñ4�M��8B6J473>6UC��4 )C�60V[8���V0X73 �608BV35M¹E6�Ò8��¹4%M¹E��� %6J8BH��W35;ÄS

à á<â�ãUä ÿ��1þãß�Jýæåç��è#��ÿ���ã�ÿ^ä ÿ�ã(�����-þ����ýéä ÿ��¥ê�ëã�ì

YI3��z )MWV3�;�CBE��Ä603� j8B60V354Ä3EÄ7CB;� ��W3��*8��� %608BV35M¹E��:�*MWV0X@E�C�V0MWKB3��)�Ä4%M��8B6D473>60354Ì603��<MW8<E���&�V0X735M¹6*Ob8<;�;=8<E%E%3���*CBE%4�lZ%E%ObV0M¹8<E@M¹EÄE%C�V0Z76J3�M��!Z%E%\NE781�*E�S�R�E78BV0X%3>6�M¹E�V3>603��V0M¹E���Z%E7603��8��¹KB354`��Z%3��V0MW8<EGM+�:�*X73>V0X73>6*V0X73>603,C�6J3�4%M��V0MPE%ObVO��PC���3��18B6�V!�$ �3��!8��s4�M��8B6J473>6J354:6J3��<MW8<E��>S· 8��¹Z7V0MW8<E��!V8ÄV0X73��3N %608BH#�W35;��IO>CBEñE78BV�Hj3N�È8<Z�E%4GH$�s�35C�6DOJX%M¹E��ÏCBE¾3EÄ7M��V0M¹E��:4%C�V0C�H�C��03Q8��� %608BV35M¹E����*M¹V0X

\uE781�*E".�Yí�0V6JZ%ObV0Z7603BSË�sMW6��V�&)M¹E��Ò8B6J;�C�V0MW8<E@C�Hj8<Z7V� %608BV35M¹Eè4%M��8B6J4%3>6!M��*E78BV�M¹E%O��¹Z%4%354ÄM¹EÄV0X73�O>Z%606035E�V� %608BV35MPE�0V6JZ%ObV0Z7603=4%C�V0C�H)C��3���M¹EñCBE��î8B6�<CBE%M)�>3549�&C��BS · 35Ob8<E%4�&�V0X%3�O>Z7606035E�V4�V6JZ%ObV0Z76DC���4%C�V0C�H�C��3��,C�603��¹MW\B3��)�èV8ÄHj3�0V608<E����)�îH�M¹C��354ñC-�<CBMPE��V�E%C�V0M¹KB3��)�î4�M��8B6J473>6J354 %608BV35M¹E���&�M)��V0X73��îC�6J3¥Ob8<;�;=8<E�&-Hj35O>CBZ��3��0Z�OJX¾ �608BV35M¹E��UC�603 j8BV35E�V0M¹C����)� 4%M|´ÏO>Z��WV�V8ïM+�8��¹C�V3GCBE%4² �Z76JM��h��&�CBE%4ìHj35O>CBZ��3èV0X73��c��8<Z��¹4ìHj3Ä603��Ò6JCBObV8B6�§V8 Ob6�%�V0C����¹M)�5C�V0M¹8<E�&��X%M¹OJXÄM+�1C�E735Ob3���0C�6��� �6035Ob8<E%4%MWV0M¹8<E��Ò8B6*V0X%3Ô473>V3>6J;�M¹E�C�V0MW8<EÌ8��(.�Y^�V6JZ%ObV0Z76J3UH���Ä�0¢6DC��ÄCBE%C��)�%�0M��>SÊ*3>603���3� %608� j8��3¥CBEïC��WV3>6JE�C�V0MWKB3�&�4%C�V0Cè;¥M¹E%M¹E��ÄC- � �608<CBOJX V8è473>V3>6D;�M¹E73���X73>V0X73>6,4�M��8B6J473>6J354ñ603��<MW8<E��

C�6J3*Ob8<;�;=8<EÏCBE%4��*X%3>V0X73>6�4%M+�V0M¹E%ObV�O��¹C���03���8���4%M��8B6D473>6�3EÄ7M��V>S�F[Z76�C- � �608<CBOJXÏ473� j35E%4��s8<E¥V0X73*473>KB3��W8� );=35EgV8��-C�;=3>V0X78u4:V8=3��0V0M¹;�C�V3[V0X734�¹MW\B3��¹MPX78�8u4�V0X�C�V&C��<M¹KB35EÄCB;�M¹E78�CBO>M¹46�3��NZ735E%Ob3UM��&E%C�V0MWKB3��)���È8��P47354¥8B6!E�C�V0MWKB3��)�Z�E��È8��P47354¾CBE%4ñV0X73�C- � #�¹M¹O>C�V0MW8<Eî8��&V0X%M��U;=3>V0X%8N4ñV8èCx�¹C�6�B3�4%C�V0C�H�C��03¥8��&CB;�M¹E78@CBO>M¹49�03���Z735E�Ob3��/�*X78��03w.�Y�0V6JZ%ObV0Z7603ÔM+�:�V0M����jZ%E7\uE781�*E�SL*M'\Ba¥OXV�b'OXV�a�V%]RTiaGZ�keP#Y[b'jBV�TiV$jhr ]5V�îïb'O1P#ð'jBV%Y¦\@]2T1M5V�b'O1P�TiV%\B] a�TiOXQ7k�T1Q7OXV�b7OXV$p'\Bk�T1\BPR] p7PRYfZ�\@]ßd

M7Z�ñ5\B]7SWZ#jBj*T1M7V¯VeòßP#OiT1a¾\B]óT1M'\Ba¾Z�OXV�ZlðßV�V%]ípo\BO1V$k�TiV$pçTiP$îNZ�OXp'a T1M5V¯b'O1V$p'\Bk�TX\hPR]óP#_wb'O1P�TiV%\B]çô�õa�TiOXQ7k�T1Q7OXV�dnOXZ�T1M7V�O*T1M7Z�]öjhZ�k1÷¾P#_�a�TiOXQ7k�T1Q7OXV�ø4ù�]fT1M7\Ba/aiV$]7a�V#dnT1M'\ha�b7Z�bßV�ONaiM7P�î�a*M7P�îqp7Z�T1ZsY[\@]'\@]5ST1V�k-M7]'\BúnQ5V$a6k�Z�]lM7V%jhb�Z�p7p'O1V$a�a6Zöb7OXP�ðojBV$YûT1M7Z�TxM5Z�a6\@Y[b(P�O1TiZ�]RT6\@Yfboj@\hkeZ�T1\BP#]7a�\@]<TXM7\Ba�p7PRYfZ�\@]ßdrRVeT�\+Tw\Ba�po\hü[keQ'jhTwTiP¾TiZ�kX÷njhV2poQ5V"TiPfaik�Z�OXk�V Zeñ�Z�\@jBZ�ðojhV2p'Z�TiZ�ø

R�;�MPE78¥CBO>M¹42�3��NZ735E%Ob3,4%3>V3>6J;�M¹E73��� %608BV35M¹E2.�Yó�V6DZ%ObV0Z76036¸Ï. º &�CBE%42�8���3,6035C��8<E7354èV0X%C�V[MWV¥�0X%8<Z��¹4@C����084%3>V3>6J;�M¹E73Ë�¹CBOJ\,8���V6JZ%ObV0Z%6031C��o��3����n¸Ï. ½-º So3�8[V3��V�V0X%M+�-X��$ �8BV0X%3��0M���&BCU4%C�V0C[35E��<MPE73>3>6JM¹E��G %608uOb3���o�Ò8B6�Ob6035C�V0M¹E��Cs�¹C�Hj3��W354¾4%C�V0C`�3>VÔ8���8B6J473>6J354 CBE%4 4%M+�8B6J473>603542 %6J8BV35M¹E9�3��<;=35E�V��M��/ %608� j8��354ñM¹E · 35ObV0M¹8<Ef.$&5�Ò8����W81��354ñH$�4�C�V0C CBE%C��)�%�0M���&,=�>�>@J�?�ý�I%>!CE�N�B35E%3>6JC�V0MW8<E�&1CBE%4ì4�C�V0C 4%M¹;=35E��0MW8<E%C��¹M¹V!� 60354�Z%ObV0MW8<E�&�C���473��0Ob6JM¹H�354§MPEF�35ObV0MW8<E Í S)&CBE�4$C` �60354%M¹ObV0MWKB3:;=8N4%3���473��0M��<EñV0X7608<Z��<Xï;�CBODX%M¹E73w�¹35C�6JE%M¹E���&-MWV��CBE�C��)�$�JM���CBE%4 C- � ��¹MPO>C�V0MW8<E ;=3>V0X78u478��W8�����&3EÄ% ��¹CBMPE7354=M¹E · 35ObV0MW8<E ½ S�F[Z76�3EÄ% ��W8B6JC�V0MW8<E����*MWV0X=E735Z%6JC��7E73>V!��8B60\`Ð@»G»,Ó�H�C��354�4%M+�8B6J473>6� %6J354%M¹ObV8B6��s603� j8B60V354MPE · 35ObV0MW8<E É M¹E%473>354 4735;=8<E��0V6JC�V354c�V608<E��î603��¹C�V0MW8<E��0X%M) ��[Hj3>Vª��3>35E§CB;�MPE78èCBO>M¹4ö�3��NZ735E%Ob3ÌC�VV6JMWH�Z%V3��,CBE%4�PCBO0\Ì8��7�Ò8��¹4%C�H)M��¹MWVª�¥C��*4%M+�0O>Z���354ÌM¹E · 35ObV0MW8<E"Ô�S

þ ásÿ1ÿ��¥ãsþÂåçÿ�þRÿÌê�ÿ:èRã(è��<��ý�è�þ�ÿn���-þ����ý3*X73¥473>KB3��W8� );=35EgV�&sV3��V0MPE��GCBE%4 C- � ��¹M¹O>C�V0M¹8<Eñ8��: %608BV35M¹E$4%M��8B6J4%3>6/ %60354%MPObV8B6��U603��NZ%MW60354¾ %6JMW8B6�Ob8<E��V6JZ%ObV0MW8<E8����3>KB3>6JC���4%C�V0C�H�C��03���&�35CBOJXñOb8<E�V0CBM¹E%M¹E��ÏC6�0Z%´ÏO>MW35EgV���`�¹C�6�B3QH�C��¹CBE%Ob354 �3>V[8���Vª��8-0nO��¹C����U3EÄuCB;� ��W3���ÐÒ8B6J473>60354CBE�4î4�M��8B6J473>6J354îCB;¥M¹E78-0nCBO>M¹4���ÓDS · 3>KB3>6JC��o �Z%H��¹M¹OÔ4%8<;�CBM¹E2 %608BV35M¹Eñ4�C�V0C:H)CBE7\$�,��3>603=Z��354 �Ò8B6[V0X%M��G �Z76� �8��03��C��¥�0Z%;�;¥C�6JM)�>354ÌM¹Ex�sM)�<Z7603 y CBE%4@C��13EÄ% ��¹CBM¹E%354ÄM¹EÄ;=8B603�4%3>V0CBM����1M¹EÌV0X%M+�:�35ObV0MW8<E�S

����� � ����������� ������������� �"!#�$&%'��(��)�*��+����-,������.����� (3*X73�2�608BV35M¹EÏYIC�V0C�Å&CBE7\sÐl2�YGÅÌÓG¸ yEº C�V�V0X%3¥Å�608N8B\NX%C�KB35Ex»�C�V0M¹8<E%C��$/�C�Hj8B6JC�V8B6�¥M���C� )Z7H��¹M¹O14%8<;�CBM¹E¥C�6DOJX%MWKB3Ob8<E�V0CBM¹E%MPE��ÔM¹E��Ò8B6J;�C�V0MW8<E�8<E:;=8B603!V0X�CBE É &ÕÖ�Ö�ÖÔ3EÄ% j3>6JM¹;=35E�V0C����)�Q473>V3>6J;�MPE7354=V0X7603>3E0n4�M¹;=35E��0M¹8<E%C��%�V6JZ%ObV0Z76J3���8�� �608BV35M¹E���&�;=8��V�8���V0X735;úH$�NÄ�0¢6DC��=Ob6�%�V0C����W8��B6JC- )Xe�BS�3!X73!2�Y,ÅìM���Ob8<;� %6DM��354=8��jC��3>6DMW3���8���V3EÄNVß{#�W3���&<8<E%3Ì�È8B6

.

Page 4: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

�-M��<Z7603 y ��3-C�6�B3>V*4%C�V0C�H)C��3��*Ob8<E��0V6JZ%ObV0MW8<E

35CBODXN %608BV35M¹E�&BOb8<E�V0CBM¹E%M¹E��!V0X73�V0X7603>3�4�M¹;=35E��0M¹8<E%C��<Ob8N8B6J4%M¹E%C�V3���8��7V0X73Ë�V0Z%4%M¹354Ô;=8��W35O>Z��¹3�&eK�C�6JMW8<Z���M¹E��Ò8B6J;�C�V0M¹8<EC�Hj8<Z7V�M¹V�&gCBE%4�V0X73!473>V3>6D;�M¹E%C�V0MW8<E�3EÄ% j3>6JM¹;=35E�V�&gM¹E�O��¹Z%4%M¹E��!H�MWH��PMW8��B6JC- �X%MPO>C��<603��Ò3>6035E%Ob3���&N;=3>V0X78u4=8���V6JZ%ObV0Z76DC��4%3>V3>6J;�M¹E%C�V0M¹8<E�&78BV0X73>6I603��W3>K�CBEgV!3EÄ% j3>6JM¹;=35E�V0C���4%C�V0C%&5��C����-; H =-J�Ç6�E>@J�I��i>@I$JC�C���0M)�<E�;=35EgV��CBE%4ÄV0X73*�¹MW\B3BSËÑG8��V8���V0X73�3EÄuV6JCÌM¹E��Ò8B6J;�C�V0MW8<EGM��¥�PC�H�3��¹354GC����}6035;�C�60\�SÕ�²�}E" %6JM¹E%O>M� ��W3�&7V0X%M��¥�8<Z76JOb3�O>CBEîHj3*�35C�6JODX7354îV8ÏMP4735EgV0M��h�C��+�n %608BV35MPE��!603� j8B60V354GV8ÏOb8<E�V0CBM¹Eî;�M���JM¹E���Ob8N8B6J4%M¹E%C�V3Q4%C�V0C%&R�*X%M¹ODX`��8<Z��¹4GMP4735EgV0M��h�ÏV0X73,4�M��8B6J473>6J354GC�V8<;��>SÊ�8i��3>KB3>6�&-M¹E2 %6JCBObV0M¹Ob3�&{)E�4%M¹E���V0X�M��[M¹E��Ò8B6J;�C�V0MW8<EîCBZ7V8<;�C�V0M¹O>C��+�)�öÐB�*M¹V0X78<Z7VI6035CB4%M¹E��ÏV0X73��W8N8��3��)�"�V6JZ%ObV0Z76J354�}6J35;�C�60\%���M¹EÄ2�YGů{R�W3���Ó�M��1C�E%8<E%0¢V6JMWKuM¹C���V0C��\Ä4%Z73UV8��

0 �¹CBO0\U8��%C¥�V0CBE%4%C�6D4/�Ò8B6J;�C�V5�Ò8B6-603� j8B60V0M¹E��!4%M+�8B6J473>60354Ô603��<MW8<E���M¹EÔV0X73�2�Y,Å9{#�¹3���ÐÒ3BSÏ�7S�C��WV0X78<Z��<X,M¹E�KNM��JMWH��W3 �C�60V�Ï8��ÔV0X73î3��W35ObV608<E�4%35E��0MWVª�ì;�C- ��ÌC�603¾Z��0Z%C������ï6J3� �8B6JV354 C��F�� j8���0M¹H��)� 4%M��8B6J4%3>60354�&Õ� 603� j8B60V�:8������35C�\%�è8B6"�E78@3��¹35ObV608<E$4735E��0MWV!�%�@C�603:C����8GZ��0354�D'�08<;=3>V0M¹;=3��,Ob8�8B6J4�M¹E%C�V3��/�Ò608<; �<MWKB35EÃJC���? H I�CE�[C�603�0M¹;� #�)�¥;�M����0M¹E���&%�*MWV0XÄE%8�;=8B603U3EÄ% ��¹CBE%C�V0MW8<EGC�H�8<Z%V1V0X73Ô6035C��8<E`�*Xe�ÏV0X73��ÄC�603U8<;�M¹VV354#Ó�D

0 M¹E%C- � �608� %6JM¹C�V3�Ob8<EgV0M¹ENZ78<Z��Ì.�Y.;�C- x�¹C�Hj3��¹M¹E��/�È8B614%M+�8B6J473>60354:603��<MW8<E���MPE��8<;�3G �608BV35M¹E��,ÐlC��WV0X78<Z��<XÌOb8-08B6J4%M¹E�C�V3��(�Ò8B6�V0X73IC�V8<;���8���C�4%M��8B6J4%3>60354=603��<MW8<E:O>CBE%E78BV�H�3�473>V3>6J;�M¹E%354=3EÄ$ j3>6JMP;=35EgV0C��+�)��&gOb8N8B6J4%M¹E%C�V3���È8B6,�0Z%ODX@603��<M¹8<E���C�6J3*�8<;=3>V0MP;=3���MPE��3>60V354èM¹E@V0X73Q4%C�V0C��3>VIV0X7608<Z��<XèZ��3,8���KeC�6JM¹8<Z��*;=3>V0X%8N4���&#�0Z%ODXGC��;=8u473��jH�Z%M��P4%M¹E���ÓDS

0 �<C- ��ÔM¹EîV0X73w.�Y ;�C- ¾�PC�H�3��PM¹E��¥V0X�C�VÔ478@E78BVUOb8B60603��z j8<E%4¾V8@4�M��8B6J473>6J354G603��<M¹8<E���ÐÒV0X%C�V�M���&�4%M��8B6J4%3>60354603��<MW8<E��4�¹35CB4ñV8x�<C- ��ÔM¹E¾V0X%3w.�YÇ;¥C- f�¹C�Hj3��¹M¹E��Ï4%Z73�V8G;�M+��0M¹E��ÌOb8N8B6J4%M¹E%C�V3=4%C�V0C%DsX781��3>KB3>6�&'�<C- ��ÔMPEV0X73�.�Y�;�C- `�¹C�Hj3��¹MPE��,478�E%8BV!E735Ob3���0C�6JM+�)�¥Ob8B60603�� �8<E�4ÌV8�4%M��8B6J4%3>60354Ï603��<MW8<E���&7Hj35O>CBZ��03[E%8<Ex�V0CBE%4%C�6J4E�Z�;�Hj3>6JM¹E��QM��!8��ÈV35EèZ��354#ÓDS

0 V0X7313EÄ7M��V35E%Ob3!8��j;QZ��WV0M) ��¹3�35E�V6JMW3����Ò8B6�V0X73��JCB;=3: %608BV35M¹E�8B6�E735C�6��)�QM¹4735E�V0M¹O>C��% %608BV35M¹E��>S78ëX735E�;QZ��WV0M� ��W335EgV6DMW3��Ä8uO>O>Z76�&UC����[KB3>6��0M¹8<E��Ä;,Z��VÄHj32�Ò8<Z%E%4�CBE�4�OJX735OJ\B354(V8 Ob8<E�{�6J; V0X73¾ �603��35E%Ob3ñ8��QV0X73¾�0CB;=34%M��8B6D473>60354ì6J3��<MW8<E��ÏM¹E C����*8��ÔV0X735;ÄSÂ3!X%M����35C�6JODX M+�¥E78BVÌC$V6DMWKNMPC��!V0C��\R&!Hj35O>CBZ��3îV0X73s�}Y,�Ï8B6:V0X73X735CB473>6��!8��s;QZ��WV0M� ��W3IKB3>6��0MW8<E��&8���C� �608BV35M¹EÄC�603�E%8BV*E735Ob3���0C�6DM��)�¥6J3��¹C�V354�S

0 3EÄuM+�V0M¹E��¥Ob8<;� ��W3EÄu3���8���Vª��8Ä4%M)Á�3>6035E�V�;�8��W35O>Z��W3��NÐÒV0X73��3��0X78<Z��¹4GHj3�C5KB8<M¹4%3542�JM¹E%Ob3,4�M��8B6J473>6J354Ä603��<MW8<E��V35E%4ÄV8�Hj35Ob8<;=3�8B6J473>60354@Z� �8<EÌH)M¹E%4%M¹E���V8¥C6��I�ý���>@Jz=�>!C�ÓDS

Í

Page 5: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0 E78@35C��z�9�&C��ñV8îM¹E�V3>6�ÒCBOb3:V0X73¥4%C�V0C�H)C��3w�*M¹V0X C`�35C�6JODXf �608��B6JCB; ÐÒV0X%3�{#�W3���O>CBE Hj3�V6JCBE���È3>606J354ñKNMPC�ÈVz ��Ò608<;úV0X73GÅ�608�8B\uX%C�KB35E�»IC�V0MW8<E%C��1/�C�Hj8B6JC�V8B6���&��*X�M¹OJX¥603���Z�MW603����Ò603��NZ735EgV�Z� �4%C�V3���V8,\B3>3� ÌV0X73�4%C�V0CH�CBE7\ÌO>Z7606035E�V!CBE%4Ä35M¹V0X73>6*C��¹C�6�B3*�V8B6JC-�B3,O>C- )CBO>MWV!�Ì8B6�C=;QZ��WV0M� ��W3, �X%C��3/�035C�6JOJXG8<E@C��W8uO>C����z�%�V35;ÄS

µ[MWKB35E V0X%3��3:4%M)´:O>Z��WV0MW3���&�E78@3EÁj8B60V��&C���;�CB4%3¥M¹EñV0X%M+�/�V0Z%4��îV8èMP4735EgV0M��h�¾C����� %6J8BV35M¹E��4�*M¹V0XñOb8<E%{�6J;=3544�M��8B6J473>6J354�603��<MW8<E���MPE�V0X73U2�Y,ÅIS�3!X73IM¹4735C*��C��&V8N{)E%4:C��0Z%´:O>MW35E�V�)���¹C�6�B34�3>V�8��5 �608BV35M¹E����*MWV0X:Ob8<E%{�6J;=3544�M��8B6J473>6J354�603��<MW8<E���C��&E73>354%354��Ò8B6&V0X73U473��0M)�<E:8���C�E735Z76DC��)E73>Vª��8B6J\w %60354�M¹ObV8B65S�3!X%M��ß��C��1CBODX%MW3>KB354ÌH$�¥Z��0MPE��V0X%34�È8����¹8i�*M¹E��N �608NOb354�Z7603wÐl4735E78BV354GC����V3� y M¹Ex�sM)�<Z7603 y Ó��

y S32 V�r�îNP#O1p�aiV�Z�OXk-M�P#]�4�õ65¼t�jhV$a S*Rí %603��¹M¹;¥M¹E%C�6�:3EÄ$ ��¹8B6JC�V0MW8<E@8���V0X73,2�YGÅu�0Z����B3��V354îV0X%C�V6�4%M��z08B6J473>6��:CBE%4²�4�M��8B6J473>6J354�����3>603�V0X73Q;=8��VIOb8<;�;=8<Eî473��0Ob6JM) �V8B6��:�Ò8B6IZ%E%8BH��3>60KB354Ä6J3��<MW8<E��>SÌ3!X%3>603��È8B6J3�&V0X73��035C�6JOJX[�z �CBOb3w�&C��,60354%Z%Ob354ñH$�ñZ��0M¹E��ÄV0X73�.�Y,ÅúH%6J8i���3>6QC�VÔV0X73Ï2�Y,Å^��8B6��¹49�*MP473���3>H[ �C-�B3¥V8�B35E73>6JC�V3QE%CB;=3��!8��'{#�¹3��1Ob8<EgV0CBM¹E�M¹E���V0X73U\B3��$��8B6J4 �YG� · F[9�Y87�9��uS�3*X%M��Ë�&C���&�V0X%3�E�Z�;�Hj3>618��'{#�W3��1V8478i��E��W8<CB4x�Ò608<; V0X73Ô2�Y,Å��'3*2²�0MWV3���C��!C��È6JCBObV0M¹8<EÄ8��sV0X73UV8BV0C���Ob8<E�V35EgV�I8��-V0X73�4%C�V0C�H�CBE7\�S

¹ S:9 Z�b'a"\Bp'V$]RTX\+tok�Z�TX\hPR]u\@] ô�õékeP�P�OXp'\@]7Z�TiVcV$]RT1OX\BV$a S�R Ob8<;� �Z7V3>6/ %6J8��B6JCB;§�&C��Ô473>KuM��354¾V8@6035CB4V0X73¾.�Y Ob8N8B6J4%MPE%C�V3è35E�V6JMW3��ÄMPE V0X73ñ4781�*E��W8<CB4%354 2�YGÅg{#�W3���&��35C�6JODX%M¹E��c�Ò8B6��<C- #��&*V0X%C�VÄM���&!603��<MW8<E��8��!Ob8<EgV0M��<Z78<Z��,603��0M¹4%Z%3��Ô;�M���JM¹E��x�Ò608<; V0X736.�Y�Ob8N8B6J4%M¹E%C�V3:35EgV6DMW3��>Sx3!X73� %608��B6JCB; �3��W35ObV354ïCBEe� {#�¹3X%C5KuM¹E��6�<C- ��/�B6035C�V3>6�V0X%CBE Î 6J3��0M¹4%Z73��[M¹E �W35E��BV0X�S*3!X�M��G %608uOb354%Z7603�;�M���03��[V0X78��3�4%M��08B6J473>60354è603��<MW8<E��V0X%C�V�C�6J3�M¹E%O��¹Z�47354UM¹EUOb8<E�V0M¹E�Z%8<Z��7.�YÃ�PC�H�3��PM¹E��&C���3EÄ% ��¹CBM¹E%354, %603>KuMW8<Z���)��&�H�Z7V�CÌ �603��¹M¹;�MPE%C�6�13EÄ% ��W8B6JC�V0MW8<EM¹E%4%MPO>C�V3��&V0X%C�V!V0X78��3�603��<MW8<E��16J3� %603��35E�V*C=;�M¹E%8B6JMWV!�:8��sV0X73U603� j8B60V354@4%M+�8B6J473>60354Ï603��<M¹8<E��!M¹EÄ2�YGÅIS

.NS3; jB\@Yö\@]5Z�TX\hPR]ÃP#_¥Q']RîNZ�]RT1V�p a�V�únQ7V%]5k�V$a SÚ3!X73/�3��W35ObV354`{#�W3��Ë��3>603��0O>CBE�E7354ÄV8�6035;�8�KB3��0 Ob8<;� ��W3EÄu3���Ðl4%M+�0O>C�6J47354@4�Z73[V8�V0X735MW6!V35E�4735E%OE�ÏV8�Hj35Ob8<;=3Ô8B6J473>6J354@Z� j8<EÌH�M¹E%4�M¹E���Ó�D0 V0X73>8B603>V0M¹O>C���;=8u473����/Ðl4%M��JO>C�6J473546�Ò8B6��¹CBO0\Ì8��s3EÄ% �3>6DM¹;=35E�V0C���Ob8<E%{�6J;�C�V0M¹8<E#Ó�D0 »¥Ñî9g�0V6JZ%ObV0Z7603��`Ðl4�M��0O>C�6J47354 4%Z%3ÏV8$3EÄuM��0V35E%Ob3Ä8��I;QZ��WV0M� ��W3�.�Y ;=8u473�����M¹EF�08<;=36{#�W3���&ß�*X%M¹ODXOb8<;� ��¹MPO>C�V354ÄV0X73��35C�6DOJX` �608NOb3�����ÓDS0 603� j35C�V354�8B6�C��P;=8��V�M¹4%35EgV0M¹O>C����03���Z735E�Ob3��¥ÐlM)�jCÔ4%M��08B6J473>60354�603��<M¹8<E�4%M¹4=E78BV�C- � j35C�6�M¹E=C����u603� j35C�V3548B6�C��¹;=8��V�M¹4%35EgV0M¹O>C��$�3��NZ735E%Ob3���&gV0X735E�C����N8���V0X735; ��3>60314%M��0O>C�6D47354��Ò8B6�M¹E%Ob8<E��JM��V35E%O>MW3���DB8BV0X73>6�*M��03�&CÌ %6J8BV35M¹E�Ob8<E�V0CBM¹E%M¹E��!V0X73��¹8<E��B3��V�Ob8<;¥;=8<E,4�M��8B6J473>6J3544�3��<;=35E�V7�&C��7�03��W35ObV354�CBE%4ÔV0X73�6035;�CBM¹E%MPE��C�603�473��¹3>V354#Ó�D0 �3��NZ735E%Ob3��N�*MWV0X Z%E%Ob8<E%{�6D;=354 4%M��08B6J473>60354$603��<MW8<E��6ÐÒ8<E��)� 2�YGÅá35EgV6DMW3���V0X�C�VQO��W35C�6��)�ñOb8<E%{�6J;=354V0X%C�V�V0X%3w�<C- ��*�È8<Z�E%4$M¹E V0X73�.�Yq�V6JZ%ObV0Z76J3�H��¾8<Z76N %608��B6DCB; C�603Ï4%M��8B6J4%3>60354ñ603��<MW8<E��/��3>603:CBO�0Ob3� %V354#ÓDS

Rú4%M��8B6D473>6¥�3��NZ735E%Ob3�;�M)�<X�V[X%C5KB3=E78w{�ÄN3542�V6JZ�ObV0Z7603N�*X%C�V�8N3>KB3>6[8B6IHj3* �C�60V0M¹C��������Ò8��¹47354n&)X%C�KNM¹E����35O�08<E�4%C�6�`�V6JZ�ObV0Z76JC���3��¹35;=35EgV��H�Z7V¥�*MWV0X"�0Z7H��V0CBE�V0M¹C���<:C�Þ�?�ýE?BÆ ?@>@Ç-&#�*X%3>603�V0X73N�¹C�VV3>6UO>C��3Q8NO>O>Z76��*8<E����ÌMPEs�0Z%´w0O>M¹35EgV�)���W8<E��Ô603��<MW8<E��5So3*X%M���M���8<E73*8���V0X73�6035C��8<E���V0X%C�VÚ %608<;� %V354¥Z���V8*�È8uO>Z���8<Z%6��V0Z%4��QV8N�W8<E��Q4%M��8B6J4%3>603546J3��<MW8<E��-8<E��)�BSo3!X73�8BV0X73>6�6035C��8<E=M+��V84 �608-{�V'�È608<;.V0X73��}H�MPC��354�Ob8<M¹EQ3EÁ�35ObV�%&u;=35CBE%M¹E���V0X%C�V�&e�*X735E* %60354%M¹ObV0MPE���¹8<E��=4%M��8B6J4%3>60354¥6J3��<MW8<E���&73>KB35E@C���35C�\Ï603��0M¹4%Z%3E0¢H���0¢603��0M¹4�Z73� %6J354%M¹ObV8B6!O>CBEx %6J8�KuM¹473,�V608<E��=603��<M¹8<E%0¢H���0¢603��<MW8<E �60354%M¹ObV0MW8<E��>S· V0C�V0M��V0M¹O>C��-CBE%C��)�%�0M��NÐ@�V3� ¹ MPEs�sM)�<Z7603 y Ó*8���V0X73QOb8<E��V6JZ%ObV354¾4%C�V0C�H�C��03,8��( �608BV35M¹E���X%C5KuM¹E��ÏOb8<E%{�6J;=354

4�M��8B6J473>6J354,6J3��<MW8<E��o�&C���Z��354�V8�4%3>V3>6J;�M¹E73&C/�0M��>3�V0X%603��0X78��¹4N¨'�È8B6(�¹8<E��Ô4%M��8B6D473>60354,603��<MW8<E���MPE,8<Z%6�4%C�V0C�H�C��3BSRó�0Z7H��3>VI8���V0X73=4%M+�8B6J473>60354G603��<MW8<E��[4%C�V0C�H)C��3�&�4735E78BV354¾C��:/�Y[9�&#�&C��[H�Z%M��¹V*Z��0M¹E���8<E��)�@V0X%8��3=4%M��8B6J4%3>603546J3��<MW8<E��18��o�0M)�>34¨&8B6��W8<E��B3>65S

½

Page 6: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

���>= �?���+@1����� �BA�@�!B��C���DFEHGI��JK���LJ'%M��(��)�*��+�N%O@1�.@QP�@�(���(µUMWKB35EÏV0X73G�J;�C������JM)�>3�8���V0X73:/�Y[9�4%C�V0C�H�C��3�&uV0X73,�V6JCBM��<XgVz�Ò8B6�&C�6J4ÌC- � %608<CBODXÌ8��5�z ��¹M¹VV0M¹E��ÔMWV&CBE%4ÏOb8<;� �C�6JM¹E�� �60354%M¹ObV0MW8<E=;�8N473��+��473��0M)�<E%354=8<E¥4%M+�SR}8<MPEgV�4%C�V0C*�0Z7H��3>V��V8/{)E%4�8<Z%V�M)��V0X73>603�C�6J3*4%M|Áj3>6035E�V( %608BV35M¹E¥4%M��8B6J4%3>60354�«��C5KB8B6���"�&C���M¹;� j8���JMWH��W3BS�RIE C��WV3>6JE�C�V0MWKB3:;=3>V0X%8N49 �608� j8��354 M¹EñV0X�M��/�V0Z%4��îM��ÔV8è473��0M��<E9�ÒCB;¥M��)��0!�z j35O>M|{)O �60354%M¹ObV8B6��-473>KB3��W8� j354,8<E�4%C�V0C��B35E%3>6JC�V354��È6J8<;#;QZ��WV0M) #�W3�C��¹M)�<E�;=35EgV��8���CI4%M��8B6D473>60354/ �608BV35M¹E*�È608<;#V0X73T/�Y[94�C�V0C�H�C��3�Ð@�V3� .=M¹Ex�sM)�<Z76J3 y ÓÚ�*MWV0X@C��lCB;�M����¥8���X%M)�<X����w�0M¹;�M+�¹C�6/ÐVU$�-±��-Æ)�Üe�-I$�ÓÌ �608BV35M¹E`�3��NZ735E%Ob3��*Ð@�V3� �� ÍCBE�4 ½ M¹EN�sM)�<Z7603 y ÓDS�3!X%M��-4%M��8B6D473>6�4%C�V0C�H)C��3135E��¹C�6�B35;�35EgV-V35OJX%E�M���Z%3&M+��H�C��0354,8<EQV0X73Ë�lCBObVsV0X%C�Vo�ÒZ%E�ObV0MW8<E%C����)��JM¹;�M��¹C�6, %6J8BV35M¹E��UX%C�KB3:X%M)�<X��)�"�0MP;�M��¹C�64.�Y �V6JZ�ObV0Z7603��>Sw3*X�Z���&n��3:O>CBE C���0Z%;�3�V0X%C�VÔV0X73:X78<;=8��W8��<Z73���X%C5KB3X�M)�<X��)�w�JM¹;�M��¹C�6�8B6J473>6J354Ì603��<MW8<E��!C��*M¹EÏV0X73U8B6JM)�<M¹E�C��# �608BV35M¹E6�Ò608<;W/�Y[9�D7H��ÌC��¹M)�<E%MPE��,V0X%35;x&%MWV1M��Ë j8���0MWH#�W3�V8MP4735EgV0M��h�èV0X73�C- � %608iÄuMP;�C�V3w�W8uO>C�V0MW8<Eñ8��&4%M��8B6D473>60354¾603��<MW8<E��ÔM¹EñC����sV0X73w %608BV35M¹E��UMPE¾V0X73¥C��¹M)�<E�;=35EgV>S��}EñV0X%M+��0V0Z%4���&<CG %608BV35M¹E�H)M¹E%4%M¹E��*CBE%4�C[YG»IR H�M¹E%4%MPE��Ì %608BV35MPE*�Ò608<;&/�YI9Ã��3>603Ì�03��W35ObV354��È8B6�V0X�M��s4%C�V0CX0¢35E��¹C�6�B35;�35EgV �608NOb3�����Z��JM¹E��ÔKB3>6��JMW8<E���8���V0X73,�0CB;=3[;=8��W35O>Z��W3¥�È8<Z�E%4:MPE¥4%M|Áj3>6035E�V��¹M¹KNM¹E��ÔHj35M¹E�����CBE�4¥8BH%V0CBMPE7354¥H$�w�35C�6DOJX%M¹E��V0X%3 · �*M����-2�608BV35M¹E�4�C�V0C�H�C��3NÐ · �*M���02�608BV�Ó�&��*X�M¹OJX=M���C/�¹C�6�B3!Ob8����¹35ObV0MW8<E�8��jO��W8��3!V8 É Ö%&ÕÖ�Ö�Ö� �608BV35M¹E��3��NZ735E%Ob3����X78��3"�0V6JZ%ObV0Z7603èM��¥;=8��0V�)�ìZ%E7\uE78i��E�S�3!X%M����uMW3��¹4%354Ã�0Z7H��0V0CBEgV0M¹C��+�)�ö�PC�6�B3>6��lCB;�M����e0!�z j35O>M|{�OÄ4%C�V0C�H�C��3��:8�� �608BV35M¹E��Ë�*M¹V0Xx�W8<E���4%M��08B6J473>60354Ì603��<M¹8<E���&%C��:�*M+����H�3Ô4�M��0O>Z���0354ÏMPEÌV0X73�9!3��JZ��WV�:�35ObV0MW8<E�S

���>� XO�����+��@1����� �BYZ@�C�@���J[�$&%O@1�\@QP @Q(���(»�6�� .�Yg¸ ¹ Û º M+�*C��V6DZ%ObV0Z76JC���4%C�V0C�H�C��3QOb8<EgV0CBM¹E�M¹E��¥;=8B6J3ÔV0X%CBE y Ö%&ÕÖ�Ö�Ö� %6J8BV35M¹Ex�Ò6JC-�<;=35E�V��473>6DMWKB354`�Ò608<; V0X734�C�V0C�Ob8<E�V0CBM¹E7354�M¹E,2�Y,ÅG&e473>KB3��¹8� �354�V8,�ÒCBO>M��PMWV0C�V3��35C�6DOJX%M¹E���CBE%4QOb608����603��Ò3>6035E%O>M¹E��7S-Rû�6�� .�Y OJX%C�6DCBObV3>6JM��V0M¹OMP;� j8B60V0CBEgV��È8B6&8<Z76:�V0Z�4���M���V0X%C�V1MWV�Ob8<E�V0CBM¹E���8<E����=8B6J473>60354Ï603��0MP4%Z73����È608<;Ç2�Y,ÅG&uV0X%C�V1M���&uCBEe�¥603��0M¹4%Z%3���V0X%C�V4%8èE78BVQC- � j35C�6,M¹E$V0X73�.�Y�Ob8N8B6J4%MPE%C�V3¥35E�V6JMW3��,8��!CG2�YGÅí{#�W3¥C�6J3¥8<;�MWVV354[�Ò608<; »�6�� .�Y*&'�*X%MPOJXñ3EÄ% ��¹CBM¹E����Xe�=V0X73I4%C�V0C�H�C��3UM���;=8��V�)��Ob8<;� %6JM��354¥8��n %608BV35MPE��Ò6JC-�<;=35E�V��MPE��V35CB4:8����ÒZ��+���3��NZ735E%Ob3��>S(3!X�M���;=35CBE���V0X%C�VC��+��V0X73,603��0M¹4%Z%3��!M¹E@V0X�M��!4%C�V0C�H�C��03QO>CBEèHj3,Ob8<E��0MP473>60354Ä8B6J4%3>60354èCBE�4s�8ÏC¥6JCBE�478<;g�0Z%H��3>V*Ob8B606J3��z j8<E%4%M¹E���MPE�JM)�>3�V8ÏV0X73,ENZ%;,Hj3>6*8���4%M��08B6J473>60354Ä6J3��0M¹4%Z73��Ì�<C�V0X73>603542�È6J8<;]/�YI9�CBE%4s�È6J8<;g�lCB;�M��)��0!�z j35O>M|{)O:/�Y[9 Ð@�0V3� �� ÉCBE�42Ô=MPE`�sM)�<Z7603 y Ó1O>CBEèH�3,Z��354@V8��B35E73>6JC�V3�H�C��¹CBE�Ob354@V6JCBM¹E�M¹E���CBE%4GV3��V0M¹E����3>V��MPE@C�����3EÄ% j3>6JM¹;=35E�V�!CBE%4V8¥60354%Z%Ob3ÔX78<;�8��W8����Ì3EÁ�35ObV�IM¹E6�lCB;�M��)��0!�z j35O>M|{)O�3EÄ$ j3>6JMP;=35EgV�/Ð@�0V3� Î M¹Ex�sM)�<Z76J3 y ÓDS

^ _ ý���` ëã(�a�¥ãcb^ã�d�ÿ�ãßè#ã�ý[þRÿ�þ����ý ÿ!ý��éåç��ì¼ã�ý�è��Iý�ÿÌë��}þ[efb^ã(�����-þ����ýFUE%Ob3��¹C�Hj3��W354@CBE�4@H�C��¹CBE�Ob354G4%C�V0C��3>V�IC�603QOb6035C�V354�&jMWV*M��!Ob6DMWV0M¹O>C���V8��È8uO>Z��*8<E@V0X73QOb8<E��V6JZ%ObV0M¹8<E@8��sV6JCBM¹E%MPE��È�=�>�>!CEJ�;���H$�ÔM¹4735E�V0M)�B�NM¹E��&CBEQC- � %6J8� %6JM¹C�V3�\uE781���W354��B3�603� %603��35E�V0C�V0MW8<E�&-�B35E73>6DC�V0M¹E��N=�>�>@J�?�ýEI�>!C���Ð@�0V3� �Û*M¹E��sM)�<Z76J3y ÓÏCBE�4ë60354%Z%O>M¹E�� MPE%MWV0M¹C��� �C�VV3>6��G4�M¹;=35E��0M¹8<E%C��¹MWVª��Ð@�0V3� y M¹E��sM)�<Z7603 ¹ C%&UCBE%4��V3� #� y 0ª.§M¹E<�sM)�<Z7603 ¹ HRÓDSÑè3>V0X78u478��W8����ÄZ��354ÌV8ÏCBOJX%M¹3>KB3ÔV0X73��3��0V3� ��!M��!4%3��0Ob6JMWHj354ÌM¹EÌV0X%M��:�035ObV0MW8<E�S

g���� hi� �$jNC��� �)�ikl�+G��*��(������\@1�������m6j@jÌa�TiOXQ7k�T1Q7OXZ�j�b'OXV�po\Bk�T1\BP#]lTiV�k-M']7\BúnQ7V�axZ�b'bojB\BV$plP#]Wb7OXP�T1V$\@]7a6]7V$V�pWTiPcTiZ�÷#Vf\@]RTiPFZ�k�k�PRQ7]RTxTXM5Z�TS#O1PRQ5b'a�P#_ÌZ�Yö\B]7P¾Z�k�\hp'a�Z�k�T�TiP�S#VeT1M7V$O�TiP¾p'V�TiV�O-Yö\B]7V`a�T1OXQ7k�T1Q7O1Von×ô�p�q«ø�LNM�Q7a�d�a�P#Y[Vs\@]5_ªP�O-YfZ�T1\BP#]Z�ð(P#Q5TG]7V$\BSRMð(P�O-\@]5S6OXV�ai\BpoQ5V$a,\ha¥Z�jhîNZ�rna¥\@]7kej@Q5p'V$p¾\B]2aiQ7k-M Zwb'O1V$p'\Bk�TX\B]7SxYfP�p'V%j!ø8r5P#O4VemnZ�Y[bojhV#d MPE �608BV35M¹Ex�35Ob8<E%4�C�6�x�V6JZ%ObV0Z76J3G �60354%M¹ObV0MW8<EÌ3EÄ% j3>6JM¹;=35E�V�/¸Ï. yEº &�MPE��È8B6D;�C�V0MW8<E6�Ò8B6*C��<MWKB35E` j8��0M¹V0MW8<EÌM¹EÄC� %608BV35MPE�03���Z735E�Ob3ÔM��1Z��0Z%C��+�)�=603� %603��035EgV354ÄH$�ÌCBEÌ8B6J473>60354x�¹M+�V&8���603��JM¹4%Z73��Ë�0Z76J608<Z%E%4%MPE��Ô35CBOJX"�3��NZ735E%Ob34 j8��0MWV0MW8<EÌCBE%4;�35C��0Z760354è8�KB3>6UCNs�?h; H �\s 8��(�8<;=3*{�ÄN3542�0M)�>3utfÐÒVª�� �MPO>C����)�sÛ�vwtxv ¹%y ÓDSG3�8Ï603� %603��035EgVG�0Z%OJXîCÏO>C�V3��B8B6JM¹O>C���PM��V�&�35CBOJXñ603��JM¹4%Z73QX%C��IV8ÄH�3Q603� %6J3��35EgV354îH$�èCÏKB35ObV8B6Ô8�� ¹ Ö:H)M¹E%C�6�ÄK�C��¹Z73���ÐÒ8<E73��Ò8B6I35CBODX9 j8���0MWH#�W3�CB;�M¹E%8CBO>MP4#ÓI603��0Z��WV0M¹E��ÄM¹E ¹ Ö�t�0n4�M¹;=35E��0M¹8<E%C��o �C�VV3>6JE��5S · Z�OJX$Cs�¹C�6�B3¥ENZ%;,H�3>6�8��'Ø�C=�>@I$JC��U603��NZ%MW6J3��ÔX�Z��B3�V6JCBM¹E%MPE��4�C�V0C��3>V���Ò8B6�CÄ6J35C��8<E%C�H��W3� �60354%M¹ObV8B6�4%3>KB3��W8� �;=35E�VwÐl4%Z73�V8GV0X73¾�O>Z76��3¥8��&4�M¹;=35E��0M¹8<E%C��¹MWVª�$�:V0X%C�VÔ603��NZ%MW6J3��

É

Page 7: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

�sM)�<Z%603 ¹ ��Y[M¹;=35E��JMW8<E%C��¹MWVª��60354%Z%ObV0MW8<E:CBE%4� %60354%M¹ObV0M¹8<E��ÚÐlCeÓ�CN�0M¹E����W3�;=8N4%3��7ÐB�B35E73>6JC���8B6Ú�ÒCB;¥M��)��0!�z j35O>M|{)OiÓ�D#ÐÒHRÓC¥Xe�NH%6JM¹46�z�%�V35; Ð�.�4%M¹;=35E��JMW8<E%C��¹MWVª��60354%Z�ObV0MW8<EÌV6JCBE��z�Ò8B6J;�C�V0M¹8<E��!C�603�4�C�V0C��z j35O>M|{)O[CBE%4Ä35CBODXGM��*4%M|Áj3>6035EgV�Ó

CBE:3EÄ% �8<E%35EgV0M¹C��)E�Z�;�Hj3>6�8��� �C�VV3>6JE����*MWV0X¥603��z j35ObV�V8QV0X73IE�Z%;,Hj3>6�8��n�Ò35C�V0Z7603��&M¹E¥8B6J473>6�V8�4%3��0M)�<E¥C,603��¹MPC�H��W3 �60354%M¹ObV8B6:�Ò8B6*C��<MWKB35EèE78<E%0!�¹MPE735C�6Ë �X735E78<;=35E%8<E¾¸ ÉXº ÓDS3!X736�0;�C����Ú�0M)�>3Ì8��*V0X%3Ï4%C�V0C9�03>V���*MWV0XïOb8<E%{�6J;=354ö %6J8BV35M¹E 4%M��8B6J4%3>6�603��<MW8<E��QC�KeCBM+�¹C�H��W3��È8B6=V0X�M��*�0V0Z%4��

�6035O��¹Z%473��4�JZ%OJX C`�z �C�6��03�603� %603��035EgV0C�V0MW8<E�S · 8�&sM¹Eñ8B6J4%3>6ÔV8G3EÄuV6JCBObV,MPE��È8B6D;�C�V0MW8<E9�Ò608<;§ %6J8BV35M¹E¾�3��NZ735E%Ob3���&MPEñ8<Z76� �608�R}35ObVQCs�3>6DMW3��Ô8��!ENZ%;=3>6JMPO>C���ÐÒ6035C��|0¢K�C��¹Z7354#ÓUKeC��PZ7354 C�VV6JMWH)Z7V3���C�603ÏO>C��¹O>Z��¹C�V354[�Ò8B6�35CBOJXc�3��NZ735E%Ob3 j8��0M¹V0MW8<E�S=R�E$C�VV6JMWH�Z7V3�C����8NO>MPC�V354¾�*MWV0XñC`�<MWKB35E¾�3��NZ735E%Ob3� j8��0M¹V0MW8<E¾M��ÔC5KB3>6DC-�B354$8LKB3>6QCx��M¹E%4781�.8��1Ob8<E%0V0M��<Z78<Z���603��0M¹4%Z%3���C�V&CBE%4ÌC�608<Z%E%4:V0X%C�VË j8��0MWV0MW8<E�S�y Pnd'_!P�O�V�mnZ�Y[b'jBV#d7\B_ÚîNV`M7ZeñRVxZ"b'OXP�TiV%\@]FZ�Yö\B]7P2Z�ke\BpaiV�únQ7V$]7k�Vxj@\B÷�V$z � ? ®� ] ®|{|{|{1®�*} Z�]7pöîNV�îNZ#]RT/TiP"Q7a�V6Z�a*Z�]fZ�T�TiO-\hðoQ5TiV�Z"]�Q7Y[V�O-\Bk�Z�job'O1P#b(V$OiT�rM~ Ð@�"��ÓZ�a�a�P�ke\BZ�TiV$pFî�\hT1MöV$Z�k-MFZ�Yö\B]7P2Z�ke\Bp �"� d7T1M5V6ñ�Z�j@Q7VxP�_I~ç_!P#O�Z"SR\hñ#V%]Fb(P�a1\+TX\hPR] � \@]öT1M7Vxa�V$únQ5V%]7k�Vî�\Bj@j�ð(V2S#\hñ#V%]¯ðr

~:��� yt��� �L�I������ ��� � � ~ Ð@� � Ó

î�M5V$O1V t \Ba�T1M7V2]�Q'Y ð(V$OwP�_¥O1V$ai\BpoQ5V$a�\@] Z î�\@]5p'P$î k�V%]RTiV�OXV$p Z�T�aiV�únQ7V$]7k�V b(P#ai\hT1\BP#] � ø��EèV0X%M��¥��Ci��&�35CBOJXñC�VV6JM¹H�Z7V3�M��*6J3� %603��35E�V354îH��@C6�0M¹E����W3�ENZ%;=3>6JM¹O>C���K�C��¹Z73�6DC�V0X73>6[V0X%CBE ¹ Ö%&jCBE�42�08:V0X%M+�

6J3� %603��35E�V0C�V0MW8<Eè603��0Z��WV�IM¹Eè;,Z%ODX �0;�C����W3>6¥ �C�VV3>6JE��5S�RG���8�&R �C�VV3>6JE2�0M)�>3�M¹E@V0X%M+�*O>C��3=M���M¹E%473� j35E%4735E�V!8���V0X73�JM)�>3Ä8��*V0X73x��M¹E%4781�/&(�*X73>6J35C���M¹EïV0X73`�¹M��0VQ8��I603��0MP4%Z73��Q603� %603��035EgV0C�V0MW8<En&ß�*M¹E�478i�U�0M)�>3@4�MW6035ObV�)�ï473>V3>6J;�M¹E%3�� )C�VV3>6JE`�0M)�>3BS

R��ÒV3>6ß�GC�VV6DMWH�Z7V3���C�6J3�O>C��¹O>Z��PC�V354��Ò8B6�C/�<MWKB35Ew j8��0MWV0MW8<E=M¹E�V0X%3� %608BV35MPE��3��NZ735E%Ob3�&gV0X%3���C�6J3¥�¹C�Hj3��W354��*M¹V0XV0X%3ÔO��¹C���1C���8uO>M¹C�V354x��MWV0XÌV0X%C�V: j8��0MWV0MW8<E9ÐÒV0X73ÔO��PC���1;=35CBE%M¹E��Q35M¹V0X73>6��}8B6J473>60354���8B6w�4%M��8B6D473>60354��eÓ�V8�Ob6035C�V3CBE`�0�4%M¹;=35E��JMW8<E%C��R �C�VV3>6JE`�JZ%MWV0C�H��W3,�Ò8B6*4%C�V0C�;¥M¹E%M¹E��N %608uOb3���0MPE��7S

g��>= ,u@1�\�.�+�*��%'��!���� (\������@QCV�����Bkl���� J��������2sC�VV3>6JEï4%M¹;�35E��0MW8<E%C��PMWV!�@6J354%Z%ObV0MW8<E M+�ÔO>C�606JMW354 8<Z7V�4%Z73¥V8���ÐlCeÓUC"�¹C�6�B3¥ENZ%;,Hj3>6U8��: �8BV35E�V0M¹C������èZ��3��lZ���C�V�0V6DMWH�Z7V3��Ú�0Z7H[R35ObV�V8QV0X%36�O>Z%6��3I8���4%M¹;�35E��0MW8<E%C��PMWV!�%�ÔOb8<E��V6DCBM¹EgV��D�ÐÒHÓ�C�VV6DMWH�Z7V3���V0X%C�V1;�Ci�:X%C�KB3,�PMWVV�W3*8B6!E%8

Ô

Page 8: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

6J3��¹C�V0MW8<E��*MWV0X:V0X73IODX%C�6JCBObV3>6JM+�V0M¹OIV8,Hj3G %60354%MPObV354�DNCBE�4#ÙL8B6/ÐlOiÓ�6J354%Z%E%4%CBE�OE�N �608N4�Z%Ob354�H$�¥X%M)�<X��)�=Ob8B60603��¹C�V354C�VV6DMWH�Z7V3��>Sx��V35; ÐlCeÓ�M+�Ô8��!;�CFR8B6QOb8<E�Ob3>6JE X%3>603:C��,V0X73:ENZ%;,Hj3>6�8��!C5K�CBM��¹C�H#�W3�/�YI9ç �C�VV3>6DE��,M+��E78BV,KB3>6��PC�6�B3BS3!X73G�È35C�V0Z76J3,�03��W35ObV0MW8<EÌCBE%4��È35C�V0Z%603[3EÄNV6JCBObV0M¹8<EÄ;=3>V0X78u4��Ú�È8B6: �C�VV3>6DEÏ4�M¹;=35E��0M¹8<E%C��¹MWVª�Q6J354%Z%ObV0MW8<EÏOb8<E��0M¹4�0

3>6J354@M¹EÌV0X%M��:�0V0Z%4��ÌC�603��0Z%;¥;�C�6JM)�>354ÄM¹EÌV0X�M��:�35ObV0MW8<E�S

� ø��ø�� r7V�Z�TXQ5OXV y V%jhV$k�T1\BPR]3*X73/�Ò35C�V0Z7603��3��W35ObV0MW8<EîC- � %608<CBODXGV8Ï60354%Z�O>M¹E���V0X73Q4%C�V0CÏ4%M¹;=35E��JMW8<E%C��¹MWVª�:Ob8<E��JM��V��8���3��¹M¹;�M¹E�C�V0M¹E��=C:ENZ%;,Hj3>68���C�VV6DMWH�Z7V3��ß�È608<; V0X73�8B6JM)�<M¹E%C����03>V�M¹Ew�0Z%OJXÏC/�&C��:C���V8Q;�M¹E%M¹;¥M)�>31V0X73�MPE��È8B6D;�C�V0MW8<E��W8����>S��735C�V0Z7603,�3��W35ObV0MW8<EOb8<E��0M��V��8��ª�xÐ y ÓÔC[>!C�|Ue;�?�³�I�C:V82�035C�6JOJX V0X73�� �CBOb3¥8��!C�����O>CBE%4%M¹4%C�V3��È35C�V0Z%603��0Z%H��3>V�UV8"{)E%4ñV0X%3¥8� %V0M¹;¥C��8<E%3�D�CBE%4fÐ ¹ Ó&C"��J�?B>!C�J�?��-;¾V8¥Ob8<;� �C�6J3�CB;=8<E��¥4�M|Á�3>6J35EgVÌ�0Z%H��3>V�>S

YIZ%3�V8�Ob8<;�H)M¹E%C�V8B6JM¹C��)3EÄ% ��W8��0MW8<En&�CBEÏ3EÄuX�CBZ��V0MWKB3G�35C�6JOJXÌ8���C��+�� j8���0M¹H��W3:�Ò35C�V0Z7603,�0Z7H��3>V��V8*{)E%4:V0X73*8� �0V0MP;�C��7OJX78<MPOb3*M���M¹;� %6JCBObV0M¹O>C��%�Ò8B6�C����uH�Z%V�V0X73��0;�C��+�W3��V�E�Z�;�Hj3>6�8���È35C�V0Z%603��>S��78B60V0Z%E�C�V3��)��&���0��È35C�V0Z76J3Ì�3��W35ObV0MW8<E�&V0X�C�VIM���&)M¹4735E�V0M)�B�NMPE��=V0X73Q8� %V0M¹;�C��+�2�Ò35C�V0Z7603��G�Ò8B6�8<Z76G %608BH#�W35;�M��¥ j8���0MWH��¹3UH��x j3>6�Ò8B6J;�M¹E����8ÏO>C��+�W354öý�J�=-;R��U=�; H ý�-I%; H ��C=-Jz��U[¸Ï. Í�º CBE%4Ä35;� ��¹8i�uM¹E��=C�;=8<E78BV8<E%3��3��W35ObV0MW8<EGOb6JMWV3>6JMW8<E�S3!X73!H%6DCBE%OJXÏCBE%4�Hj8<Z%E�4��35C�6JODXw %6J8NOb3����Ob8<E��0M��0V��8���3EÄ% ��W8B6JMPE��UV0X73�O>CBE�4%M¹4%C�V3Ì�Ò35C�V0Z7603,�0Z7H#�3>V��M¹E¥C�V603>3E0

�PMW\B3*�lC��0X%M¹8<E�&R�0V0C�60V0M¹E����È6J8<; V0X%3Q8B6DM)�<M¹E%C��5�È35C�V0Z76J3��03>V3��MPE%O��¹Z%4%MPE��¥C����-C�VV6JMWH�Z%V3���&�CBE%42�B8<M¹E��Ì478i�*EîV0X73�V603>3H$��6035;=8LKNM¹E��U8<E73��Ò35C�V0Z7603*C�V�CÔV0M¹;=3BS�3!XNZ���&gV0X73:{�6��0V(�W3>KB3��78��jV0X73!V603>3IOb8<E��0M��0V��8���C������Ò35C�V0Z7603¥�JZ7H��3>V��8����0M��>3 L� y &e�*X%3>603Ì �M���V0X73*ENZ%;,Hj3>6�8���È35C�V0Z76J3���M¹E=V0X%3!8B6JM)�<M¹E�C����3>V�&gV0X%3¥�35Ob8<E%4��W3>KB3���Ob8<E�V0CBM¹E���V0X73��0Z%H��3>V��8��n�0M��>3 �� ¹ CBE�4"�8Ï8<E�SG�ª��C��<MWKB35E2�0Z7H#�3>VIX�C���CÏOb6JMWV3>6JM¹8<EGK�C��¹Z73,V0X%C�VUM��¥�J;�C����W3>6�V0X%CBEGV0X�C�VI8���C��0Z%H��3>V¥�¹8NO>C�V354C�VUC6�W81��3>6/�W3>KB3��sM¹EîV0X73QV603>3�&�V0X%35EîC��+��V0X73=E78u473��IHj3��W8i��MWV[C�603�3��¹M¹;¥M¹E%C�V354èH�35O>CBZ��3�&jH��èV0X73Q;�8<E78BV8<E%M¹O>MWVª� �608� j3>60V!��&7V0X735M¹6*Ob6JMWV3>6JM¹8<EÌKeC��¹Z%3��!O>CBE@E78BV!Hj3/�¹C�6��B3>65S3!X73*;=8<E%8BV8<E73¥�3��¹35ObV0MW8<E¥Ob6JM¹V3>6JMW8<E¥Z��354�M¹E=V0X�M��ß�V0Z�4��QM+��V0X73:�¾=�U$=�Æ|=-;R�eýE?h� H ?h��>�=�;#��C��#�*X%MPOJX�M���M¹EgKB3>6��3��)�

�608� j8B60V0MW8<E%C��sV8îV0X73:;¥M¹E%M¹;QZ%; 3>60608B6* %608BH�C�H)M��¹MWVª�èCBE%4 ;=35C��0Z7603��,V0X73:8�KB3>6��¹C- � �M¹E��@8��!O��PC����4%M+�V6JMWH�Z%V0MW8<E��>S�}EGC:V!��8-0nO��¹C���I8B6J4%3>6�Ùe4%M��8B6D473>6Ì %608BH#�W35; �C�VV3>6DE���O>CBEèHj3/�B608<Z� j354èM¹EgV8:V!��8ÏO��PZ��V3>6���&�473� j35E%4%M¹E��=8<EGV0X735M¹6O��PC���>Ss3!X%3�ÑîCBX%C��¹CBE78BH�M+�,4%M+�V0CBE%Ob3?� Hj3>V!��3>35EïV0X73¥Vª��8ñ4%C�V0CîO��¹Z��V3>6��/�*MWV0Xï;=35CBE KB35ObV8B6��u� ? CBE%4�� ] M+�Ob8<;� �Z7V354@C��

� ��  ÐS��¡8�'�£¢1Ó�¤8y � ¢ ÐS��¡8�'�£¢1Ó��X73>603

y � ÐB� ? � y Ó¦¥ ?H§ ÐB� ] � y Ó¦¥ ]� ?�§ � ] � ¹CBE�4�� ? CBE%4w� ] C�603*V0X73�E�Z%;,Hj3>6�8��� �C�VV3>6JE���M¹E=35CBODXÌO��¹Z��V3>6�&e�*X%M��W3¨¥ ? CBE%4?¥ ] C�6J3*V0X73IO��¹Z��V3>6���©<Ob8�K�C�6JM¹CBE%Ob3;¥C�V6JM¹Ob3��>S

� ø��ø�� r7V�Z�TXQ5OXV ; m�TiOXZ�k�TX\hPR]�}EFØ�C=�>@I%JCcCÞ�>@Jz=��i>@?@�-;ë;=3>V0X78u4���&UC�VV6JM¹H�Z7V3��@M¹EëV0X%3f �0n4%MP;=35E��0MW8<E�C��¥ )C�VV3>6JE��GC�6J3$Ob8<;�H)M¹E7354ëV8² �608N4�Z%Ob3�J;�C����W3>6z0n4�M¹;=35E��0M¹8<E%C��ß )C�VV3>6JE��:8��T� �Ò35C�V0Z7603��>S�3�8 CBOJX�MW3>KB3èV0X�M��=60354%Z�ObV0MW8<EÃ�*M¹V0XìC$;�MPE%M¹;�C��&M¹E��Ò8B6J;�C�V0M¹8<E�¹8���Ô8<Z76��V0Z%4��ñ35;� ��W81�B354 C2�¹M¹E735C�6�V6JCBE��z�Ò8B6J;�C�V0MW8<E V35OJX�E%M��NZ73:O>C����¹354 È#J�?h;R��? È%=-ÆÌ���-±¥È%��;RCE;�>B�s=-;R=-Æ ÇX��?+��¸ ÉXº &8B6«ª­¬)®US3!X%M+��;=3>V0X%8N4¾603��PMW3��I8<E��)�@8<EîV0X73=8B6JM��<M¹E%C��-C�VV6JMWH�Z7V3���&R��MWV0X78<Z7V[Ob8<E��0M¹4%3>6JM¹E��ÏV0X73�603��z j35ObV0MWKB3=O��¹C���MPE��È8B6D;�C�V0MW8<EÄC��!M¹EÌV0X%3I��0��Ò35C�V0Z7603��3��¹35ObV0MW8<E@;=3>V0X78u4�S

Î

Page 9: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

3!X73:2˶&R C��)�B8B6JM¹V0X%; ;¥C- ��* �0n4%M¹;=35E��0MW8<E%C��� )C�VV3>6JE�� m�¯ V8���0n4%M¹;=35E��JMW8<E%C��sKB35ObV8B6��a° ¯ &��*X73>603­��±  %SÒ�35ObV8B6�� m�¯ O>CBE@Hj3[603� %603��35E�V354GC����¹M¹E735C�6!Ob8<;,H�M¹E%C�V0M¹8<E��18��o ¥8B60V0X%8<E78B6J;�C��jKB35ObV8B6�� Q �sC��

m ¯ � ²� �³� ?K´ ��Q��CBE�4@O>CBEÄHj3ÔC- � %608iÄuMP;�C�V354ÄH$� µ

m ¯ � ¶���� ?K´ ��Q)� § ²���� ¶ � ?"·��Q)�

��X73>603ÔC���� · ��C�603ÔOb8<E��V0CBE�V�>S3!X73Ô;�M¹E�M¹;,Z�; C- � �608�Ä7M¹;�C�V0MW8<E@3>60608B6!8uO>O>Z76��:��X735EÌV0X73ÔH�C��JM��&KB35ObV8B6�� Q �0C�V0M+�z�h�¸ Q¹�wº#Q

;�35CBE%M¹E��QV0X%C�V&V0X73��:C�6J3IV0X%3I35M��B35EgKB35ObV8B6��!8���V0X73U4%C�V0C��3>V1Ob8�K�C�6JM¹CBE�Ob3Ô;�C�V6JM|Äx¸:So3*X73 · �@��8���V0X%M+��;�MPE%M¹;QZ%;3>6J608B6¥C- � %6J8�Ä7M¹;�C�V0MW8<E§Ob8B606J3��z j8<E%4ïV8 V0X73Ä35M)�B35E�KeC��PZ73���& º ��S · 8�&�V0X73@;�M¹E%MP;,Z%; 3>60608B6¥8��IC?��0n4�M¹;=35E��0M¹8<E%C��C- � %608�Ä7M¹;�C�V0M¹8<E M��ÌCBODX%MW3>K�C�H��W3¾H�� 4%M��0O>C�6J4�M¹E��$V0X%32 »���W�J;�C����W3��V:35M)�B35E�KeC��¹Z%3��ÄCBE%4 V0X735MW6ÄOb8B60603��z j8<E%4�M¹E��35M��B35EgKB35ObV8B6��5S��E4 �6JCBObV0M¹Ob3�&eV0X73�4%C�V0C¥�3>V�M��{)6��V�E78B6J;¥C��¹M)�>3544�8!V0X�C�V�35CBOJX*�È35C�V0Z%603�X%C��5�>3>608*;=35CBE,CBE%4ÔZ%E%M¹V�K�C�6JM¹CBE�Ob3�&eCBE%4

V0X%35EÄV0X73Ô35M)�B35E�K�C��¹Z73��!CBE%4@35M)�B35EgKB35ObV8B6���8��sV0X73ÔOb8LKeC�6DM¹CBE%Ob3,;¥C�V6JM|ÄÄC�603�O>C��¹O>Z��PC�V354�Sß3�8��B35E73>6JC�V3QC=60354%Z%Ob354��0n4%M¹;=35E��JMW8<E%C���4�C�V0CN�03>V�&NV0X%3I8B6DM)�<M¹E%C��# �C�VV3>6JE��&C�603, %6J8�R}35ObV354Ì8<E�V8=V0X73I35M)�B35EgKB35ObV8B6��*Ob8B60603�� �8<E�4%M¹E��ÔV8�V0X73�2�¹C�6�B3��V!35M��B35EgK�C��¹Z73��>S(3*X%M��1;=8u4%M|{�354Ì4%C�V0Cw�3>V*M��1Z��0354ÄV8¥473>KB3��W8� GV0X73�E735Z76DC���E73>V!��8B60\6 %60354%MPObV8B65S¼ ä ÿ�ã(�����-þR��ÿ�èuåçã�½¥ã�ë�¨d�ì ã�ýIþíÿ!ý��éäöã�ÿ�¾��*ÿnì ÿ!ý���ã]¿ ý�ÿÌë¦e�è�èRG���: �60354%M¹ObV8B6��=Ob8<E��0M¹473>60354 M¹E§V0X%M��w�V0Z%4��ö��3>6J3GH�C��354ì8<EÃ�Ò3>354Ã�Ò8B6��C�6D4 E735Z76DC��1E73>V!��8B60\%�w�*M¹V0X§8<E73GX%MP4%04%35E¾�¹C��B3>6Q35;� ��¹8i�uM¹E��x�0Z� j3>60KuM��3549�W35C�6DE%M¹E��6�Ò608<; 3EÄ7CB;� ��W3���V0X7608<Z��<XñV0X%3�H�CBO0\$ %608� )C-�<C�V0MW8<Ef�W35C�6DE%M¹E��@C��)�B8-06DMWV0X%;q¸ Í�Í�º Ð@�V3� ¹ MPEw�sM)�<Z7603 ¹ C%&��V3� �� Í 0 É MPEw�sM)�<Z7603 ¹ HRÓDS(�78B6&35CBOJXÄ4%C�V0CN�3>V�&uCBEÌC- � %608� %6DM¹C�V3*C�6JODX%MWV35ObV0Z7603M+��4%35O>M¹47354ÏH��ÏCQV6JM¹C��jCBE%4Ì3>60608B6Ë %6J8NOb3����&��*X73>603IV0X73UE73>V!��8B60\6�0M)�>3UM���Hj8<Z%E%47354ÏCBO>Ob8B6J4%MPE���V8=V0X734�0M)�>3[8���V0X73C�KeCBM+�¹C�H��W3UV6JCBMPE%M¹E���4%C�V0C��3>V>S

R¥�WV0X%8<Z��<X@C���� %6J354%M¹ObV8B6��Ë��3>603�E735Z%6JC���E73>V!��8B60\ÌH�C��354n&7V0X73��ÄO>CBE@Hj3UO>C�V3��B8B6JM)�>354îC����

0 S�V%]5V$OXZ�j 0ß�0M¹E����¹3[;�8N473��+�&V6JCBM¹E7354@Z��0M¹E��=C�����C�KeCBM��PC�H��W3Ô4%M��08B6J473>60354Ï3EÄ7CB;� ��W3���Ð@�sM)�<Z%603 ¹ CeÓ�D0 _!Z�Yö\@jhrQÀ�a�b(V$ke\ht'k 0ß�0M¹E����W3U;=8u473����&V6DCBM¹E7354ÄV8� �60354%M¹ObV1C� �C�6JV0M¹O>Z��¹C�61Vª�� j3U8���4%M��8B6D473>6�DuCBE%40 MRrnð7O-\Bp 0Ú�z�%�V35;���V0X%C�V[Ob8<;�H)M¹E73/�lCB;�M��)��0!�z j35O>M|{)OG %6J354%M¹ObV8B6���M¹EgV8Ï;=8B603*�B35E73>6JC��-4%M��8B6J4%3>6: %60354%M¹ObV0MPE���z�%�V35;��IH��èZ��0M¹E��ÏCBEF=-J�ý�?B>!C�J*E735Z76DC���E73>Vª��8B6J\è4735O>M��JMW8<E`�*X%35EèV0X%3,H�C��03* %6J354%M¹ObV8B6��I4%M��0C-�B6J3>36Ð@�sM)�<Z76J3¹ HRÓDS

Á���� �?����(\(�DÃÂÄ@�C��V @1�������-ÅO� @�C���(\�V(»�35Z76JC���E73>V!��8B60\9 %60354�M¹ObV8B6��U473>KB3��W8� j354$8<E 4%C�V0Cs�03>V�Ô8BH%V0CBM¹E%354 Z��0M¹E��@2Ú¶&RÇCBE%4Z��0��Ò35C�V0Z7603��3��W35ObV0MW8<Ef��3>603V3��0V354@V0X7608<Z��<X@C ½ 0nOb608���*KeC��PM¹4%C�V0MW8<E� %608uOb3���>S��Eñ3EÄ% j3>6JM¹;=35E�V�ÔZ��JM¹E��x�Ò35C�V0Z7603w�3��¹35ObV0MW8<E%0¢H�C��354 4%C�V0CÄ60354�Z%ObV0MW8<E�&7�È35C�V0Z76J3��/��3>603¥M¹4735E�V0M|{�354¾V0X%608<Z��<X$CBE

CBE�C��)�$�JM��G �3>6��È8B6J;�354¾8<E C�����C5K�CBM��¹C�H#�W3=4%C�V0C@CBE%4¾60354�Z%Ob354 4%M¹;�35E��0MW8<E%C��-4%C�V0CÄM��Ô6JCBE%478<;����` �C�60V0MWV0M¹8<E7354ñM¹E�V8{)KB3¥4%M��SR8<M¹E�VG�JZ7H��3>V�U35CBODX$H)C��¹CBE%Ob354 C��UV8èX%C5KB3:V0X73w�0CB;=3:E�Z%;,Hj3>6U8���8B6D473>60354 CBE%4$4%M��8B6J4%3>603542 �C�VV3>6JE��>S

Û

Page 10: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

�}EñOb8<E�V6JC��V�&5��X735E¾Z��0M¹E��Ì2Ú¶1RÌ0¢H�C��0354 �È35C�V0Z76J3=3EÄNV6JCBObV0M¹8<E�&�V0X73�4%C�V0CÄM+�¥ )C�60V0MWV0MW8<E7354îHj3��Ò8B603� %603� %608uOb3���0MPE���&2˶&R M���O>C�606JM¹354§8<Z7V��3� �C�6DC�V3��)� 8<Eì35CBOJXç�}6JCi���ñV6JCBM¹E�M¹E��9�3>V�&1CBE%4§V0X73G603��0Z��WV0MPE��¾35M)�B35EgKB35ObV8B6Ä;�C�V6DM|Ä M+�Z��354@V8ÏV6JCBE��z�Ò8B6J; V0X73�8B6DM)�<M¹E%C�V0M¹E���V6JCBM¹E%MPE��w�3>V[CBE%4@V0X%3QOb8B606J3��z j8<E%4%M¹E��=K�C��¹M¹4�C�V0MW8<E@CBE%4èV3��V0M¹E��6�3>V��V8ÏC�¹8i��3>6z0n4%M¹;=35E��0MW8<E%C���z �CBOb3BS8 X735EQCBE%C��)�$�5M¹E��IC¥� �35O>M){)O(�0M¹E����W3�E735Z%6JC��gE73>Vª��8B6J\e0¢H�C��0354* �60354%M¹ObV8B6�& Í 8��7V0X73��3&4%C�V0C,�0Z7H��03>V��C�603&;=3>6�B354

CBE�4ÔV0X735E,6JCBE%478<;w�)�¥ )C�60V0MWV0MW8<E7354,M¹EUV0X73��È8��+�W8i�*MPE��*;�CBE%E%3>6�� Î Ö*Æ(8��7V0X73�4%C�V0C� j8<M¹EgV��M���Z��354ÔV8IV6JCBM¹E,C*E735Z76DC��E%3>V!��8B60\#&'�*X%M+�W3�V0X73=6035;�CBM¹E�M¹E�� ¹ Ö*Æ M���Z��354ñV8G;�35C��0Z7603w�NZ%C��¹M¹V!�G8��&V0X73w %60354%M¹ObV8B6,4%Z76JM¹E��:V6JCBMPE%M¹E��ÄC��ÔV84%35O>M¹473���X735E�V8��V8� ÏV0X73�V6DCBM¹E%M¹E��� %608uOb3���>SßµI35E73>6JC��PM)�5C�V0MW8<EÏM���603� j8B60V354:H$�=V3��V0M¹E��QV0X73*V6DCBM¹E7354� �60354%M¹ObV8B6�©Õ�CBO>O>Z%6JCBOE�=8<E=V0X73!6J35;�CBM¹E%M¹E��¥{#�ÈV0X=4%C�V0C*�0Z7H��03>V>S'3!X�M��o %608uOb3����M���603� j35C�V354�V0X76JMPOb3: �3>6�3EÄ% j3>6JM¹;=35E�V�&<35CBODX¥V0M¹;�3�0V0C�60V0M¹E����Ò608<; 4%M|Áj3>6035EgV!MPE%MWV0M¹C��¹M��5C�V0MW8<E���8���V0X73�E735Z%6JC���E73>Vª��8B60\x )C�6JCB;=3>V3>6���&�CBE%4ÄV0X73,603��0Z��¹V�!C�603�C�KB3>6JC-�B354�SRúV8BV0C��s8���{�KB3�3EÄ$ j3>6JMP;=35EgV�IC�603N j3>6�È8B6D;=354�&�35CBOJX9�W35C�KNM¹E��:8<Z7V[CÌ4%M|Áj3>6035E�V�4%C�V0C6�0Z7H#�3>V��Ò8B6��-I�>ÈÇ���ØÉǪ�E=-±¥È#Æ�CV3��0V0M¹E��7S/3!X73�C5KB3>6DC-�B354 V3��V0M¹E��Ï6J3��0Z��WV�8���V0X73��3 y�½ E735Z76DC���E73>Vª��8B6J\$�UM��[Z��0354èV8ÄOb8<;� )C�603=CB;=8<E��Ä4%M|Áj3>6035E�V�Ò35C�V0Z7603�60354%Z%ObV0MW8<EÌV35ODX%E%M��NZ73��>S��E§C¾X���H%6DM¹4f �60354%M¹ObV0MW8<Ec�z�%�V35;¦�3� )C�6JC�V3x�È35C�V0Z%603Ä60354%Z%ObV0M¹8<E��N��3>603x j3>6�Ò8B6J;=354ö�Ò8B6=35CBOJX§8��IV!��8ñH�C��3

�lCB;�M����e0!�z j35O>M|{�O�;=8u473�����&�C�����3�����C��N�Ò8B6�V0X73ÄC�60H�MWV3>6�E73>V!��8B60\�S¾�}E[�0Z�OJX C �z�$�0V35;x&�CBE%4ïC���0Z%;¥M¹E��s�Ò35C�V0Z7603�03��W35ObV0MW8<E%0¢H�C��0354@4%M¹;=35E��0MW8<E%C��¹M¹V!��60354�Z%ObV0MW8<E�& ½ 0nOb608���*KeC��PM¹4%C�V0MW8<E6 %6J8NOb3�����V3� ��!Ob8<E��JM��V354Ä8��«�

y S��3��W35ObV0M¹E����È35C�V0Z76J3��Ì�Ò8B6!35CBOJXè8���Vª��8��ÒCB;¥M��)��0!�z j35O>M|{)OI4%C�V0C��3>V��4735E78BV354@C��¥�3>V ? CBE%4`�3>V ] D¹ SÌ�B35E73>6JC�V0M¹E���V!��8w�B608<Z� ��&8��o �C�VV3>6JE��:�Ò608<; 35CBODXG8B6DM)�<M¹E%C��R�lCB;�M��)��0!�z j35O>M|{)OI4%C�V0C��3>V��

0 �3>V ?¦Ê¬? Ob8<E��0M+�V0M¹E��=8��o�%CB;�M����e0 y 4�C�V0C��*MWV0Xx�%CB;¥M��)��0 y �È35C�V0Z76J3���D0 �3>V ?¦Ê ] Ob8<E��0M+�V0M¹E��=8��o�%CB;�M����e0 y 4�C�V0C��*MWV0Xx�%CB;¥M��)��0 ¹ �È35C�V0Z76J3���D0 �3>V ]Éʬ? Ob8<E��0M+�V0M¹E��=8��o�%CB;�M����e0 ¹ 4�C�V0C��*MWV0Xx�%CB;¥M��)��0 y �È35C�V0Z76J3���D�CBE%40 �3>V ]ÉÊ ] Ob8<E��0M+�V0M¹E��=8��o�%CB;�M����e0 ¹ 4�C�V0C��*MWV0Xx�%CB;¥M��)��0 ¹ �È35C�V0Z76J3���D.NSÌ �C�60V0MWV0M¹8<E%M¹E���35CBODX¾8���V0X73��3�4%C�V0C��3>V�[M¹E�V8 ½ H�C��¹CBE%Ob3542�0Z7H#�3>V��C��[M¹EèV0X73��0M¹E����¹3/ %60354%MPObV8B6IO>C��3�&jH�Z%V %603��3>6JKNM¹E��=V0X73Ô8B6J473>6DM¹E��=8��sV0X73� )C�VV3>6JE��Ì��MWV0X%M¹EÏV0X73N�3>V�*ÐÒ3BSÏ�7SË��0¢V0X" �C�VV3>6JEG8<Es�3>V ?¦Ê¬? CBE�4@8<Es�03>V ?¦Ê ]�0X78<Z��P4ÌH�8BV0XÄOb8<;�3��Ò608<; V0X73/��0¢V0Xs �C�VV3>6JEÄ8<E"�3>V ? Ó�D

Í SÌ�B35E73>6JC�V0M¹E��èV6JCBMPE%M¹E���&-KeC��PM¹4%C�V0MW8<E CBE%4ïV3��V0M¹E��2�3>V���È8B6Q35CBOJXc�lCB;�M����e0!�z j35O>M|{�O� %60354%M¹ObV8B6�CBE%4 V6JCBM¹E%MPE��V0X735;�C���Z��0Z%C���D

½ SÌ�B35E73>6JC�V0M¹E�� y�½ C�60H�M¹V3>6!V6JCBM¹E%MPE��Q4�C�V0C��3>V�*ÐÒ8<E%3/�È8B6*35CBOJX ½ 0nOb608���!K�C��¹M¹4�C�V0MW8<EÌ3EÄ$ j3>6JMP;=35EgV�Ó�H$�R�

0 V3��V0M¹E��2�lCB;�M��)��0!�z j35O>M|{)O� �60354%M¹ObV8B6�� y CBE%4 ¹ 8<EïV6JCBM¹E%MPE��G4%C�V0C2�Ò608<;��3>V ?¦Ê¬? CBE%4c�3>V ?¦Ê ] &�6J3��z j35O�0V0MWKB3��)�RD�CB4�4%M¹E���V0X%3*��0¢V0X" �C�VV3>6JE2�Ò608<;��3>V ? V8ÏV0X73�C�60H�MWV3>6�©Õ�*V6JCBM¹E%MPE��¥4%C�V0CÏM)�sV0X73>603QM���C¥V3��V0M¹E��4%M��0C-�B6J3>35;=35EgV*8<EÄV0X73/��0¢V0Xs �C�VV3>6JE�D0 603� j35C�V0M¹E��@V0X%3�V3��V0M¹E���ÙeCB4�4%M¹E��` �608NOb3����4�*MWV0X9�lCB;�M����e0!�z j35O>M|{�O* �60354%M¹ObV8B6�� y CBE%4 ¹ Hj35M¹E��ÄV3��V3548<E`�3>V ]Éʬ? CBE�4x�3>V ]ÉÊ ] V6JCBM¹E�M¹E���4%C�V0C%&�603�� �35ObV0M¹KB3��)�BS

É S*;=3>6�<M¹E��ÌC��+� y�½ C�6JH�MWV3>6Ô4%C�V0Cx�3>V��&�3��¹M¹;�MPE%C�V0M¹E��¥4�Z� ��¹M¹O>C�V3N �C�VV3>6JE���Ðl4%Z73�V8Ä8�KB3>6��PC- � �M¹E���Ó�&�CBE%42 �3>60�È8B6D;�M¹E����Ò35C�V0Z7603��3��¹35ObV0MW8<EÄ8<E@V0X%3ÔOb8<E��8��¹M¹4�C�V354 ¹ 0��ÒCB;¥M��)�:4�M��0C-�B603>35;=35E�V*4%C�V0Cw�3>V>S

Ô�S�3�6DCBM¹E%M¹E��ÔE%35Z76JC��%E73>Vª��8B6J\$��8<E�V0X73 y�½ 8B6JM��<M¹E%C��%C�60H)MWV3>6�V6JCBM¹E�M¹E��Ô4%C�V0C*�3>V��&uC-�ÈV3>6Ú �C�60V0MWV0M¹8<E%M¹E��[35CBOJX6�3>VM¹E�V8�V6JCBM¹E%MPE��QCBE�4ÄKeC��PM¹4%C�V0MW8<Ex�0Z%H��3>V�1C��!35C�6��¹MW3>65S

y Ö

Page 11: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

R¥��C�Ob8<E��3��NZ735E%Ob3�&R�È8B6*35CBOJXî8��sV0X73 y�½ 3EÄ% j3>6JM¹;=35E�V��&7V0X73>6J3�C�603�Vª��8:V6JCBM¹E7354`�ÒCB;�M+�)�e0!� �35O>M){)OG %60354%M¹ObV8B6��CBE�4ìC ¹ 0��lCB;�M��)� C�60H�M¹V3>65S 3!X%603>3s�3>V��&18<E%3`�È8B6:35CBOJX E735Z76JC��*E73>V!��8B60\R&:�*MWV0XìOb8B606J3��z j8<E%4%M¹E�� �C�VV3>6DE��¥C�603Z��354F�Ò8B6¥V3��V0M¹E��7S 8ëX735EìV3��0V0M¹E���&&35CBOJX �ÒCB;¥M��)��0!�z j35O>M|{)O� %60354%MPObV8B6¥M���C- � #�¹MW354 V8$V0X%3` �C�VV3>6JE²�*�Ò608<; MWV�Ob8B6J603��z j8<E%4%M¹E��UV3��V0M¹E��N�3>V�CBE�4¥M)�jV0X73��¥C-�B6J3>3�V0X73G�z�%�V35;6©Õ�� %60354%M¹ObV0M¹8<E¥M���Ob8<;� �Z7V354ÏC���V0X%3�C5KB3>6DC-�B3U8���H�8BV0X3EÄ% j3>60V�|©N8<Z7Vz �Z7V�5S��ª��V0X%3��:4%M��JC-�B603>3�&uV0X73UC�60H�MWV3>6�©Õ�Ú %6J354%M¹ObV0MW8<E:8<EÌV0X73,��0¢V0X6 �C�VV3>6JE��Ò608<; MWV��V3��V:�3>V!M���Z��354C��*V0X73/�z�%�V35;6©Õ�*8<Z7Vz �Z7V>S�9*3� �8B6JV354ÄV3��V0M¹E��=6J3��0Z��WV�!C�6J3ÔC5KB3>6JC-�B354 �0CB;=3,C��!M¹EÄC��0MPE����W3, %60354%MPObV0MW8<EÄ;=8u473��ÍSÁ��>= ,u�+�*�����*!�@Q� J[�iÅO��@�C�� (\��(6���-@��&Ë'������C�@1�.��&̨%OkÍ%O@1�.@QP�@�(��

�-M��<Z7603�.$��2-3>6�Ò8B6J;�CBE%Ob3,CBE%C��)�%�0M��1CBE%4@C- � ��¹M¹O>C�V0MW8<E

R¥����4�C�V0C@Z��354 MPE ½ 0nOb608���,KeC��¹MP4%C�V0MW8<EîV6JCBM¹E%MPE��6�È8B6ÔHj8BV0X¾�JM¹E����W3=CBE%4 X��NH%6JM¹42 %60354�M¹ObV8B6��4�&C��Ô603��B6J8<Z� j354MPEgV8�Ob8<;� ��W3>V3[4%C�V0CN�3>V�Ú�*X%M¹ODX���3>603UZ��354¥V8QV6DCBM¹E¥V0X%3Ì{)E%C���E735Z76DC���E73>Vª��8B60\� %60354%MPObV8B6��>So3!X73��3G��3>6J3�V0X735EV3��0V354 8<E$CG4%C�V0C�H�C��3�8��Ë %6J8BV35M¹E��,�*MWV0X9�¹8<E��G4%M��08B6J473>60354î603��<MW8<E��ÔC���35;,H��W354ñV0X%608<Z��<X¾�¹M¹V3>6JC�V0Z7603��35C�6DOJX73��Ð@�0V3� y M¹Ex�sM)�<Z76J3�.�ÓDS�RG���jV0X73��3/ �608BV35M¹E��1C�603,Z%E7603��¹C�V354ÌV8¥V0X78��3�M¹EÌV0X%3­/�Y[9(4�C�V0C�H�C��3BS3!X73��0V0C�V0M��V0M¹O��'�B35E73>6JC�V354N�Ò608<;#V0X73��3�V3��V�Ob8<;� ��W35;=35E�V354*�*MWV0X* %603>KuMW8<Z���Ob6J8����K�C��¹M¹4�C�V0MW8<EÔ603��JZ��WV�-X73��) j354

4%3>V3>6J;�M¹E73,�*X�M¹OJX6 %6J354%M¹ObV8B6��!C�6J3/��8B6JV0X@C- � ��)�uM¹E��QV8w�¹C�6��B3/ �Z7H��PM¹O*478<;¥CBM¹Ex %608BV35MPEÄ4%C�V0C�H�C��3��>S

Á��>� ÅlG G CV��J[@1�������w�\�BÌ�@Q�����i,������.���V�Î%O@1�.@QP�@�(���(3*X73/»*6�� .�Y�4%C�V0C�H�CBE7\���C��!Z��354ÄV8�3��V0MP;�C�V3ÔV0X73/�lC����34 j8��0M¹V0MWKB3[3>60608B6!6JC�V3�8�� %60354%M¹ObV8B6��Ô8<EïC"�¹C�6��B3:4%C�V0C2�3>V>S"3*X735E�&-V0X73� �60354%M¹ObV8B6�����3>6J3ÏC- � #�¹MW354ñV8îV0X73 · �*M���02�608BV�4%C�V0C�H)C��3:V8

C����3����V0X73�Ob8<;�;=8<E�E73���!8���4�M��8B6J473>6J354Ä603��<MW8<E��*M¹EGE%C�V0Z%603�CBE%4G3EÄuM��0V35E%Ob3Ô8���K�C�6JMW8<Z��!4�M��8B6J473>6Ì�)C5KB8B6���Ð@�V3� ¹ M¹Ex�sM)�<Z7603�.�ÓDS

Ï b^ã(è��ë}þRè9*3��0Z��WV��8<EÃ�B35E73>6JC���CBE%4F�lCB;�M��)��0!�z j35O>M|{)OÏ4%C�V0C�H�C��03��:Ob8<E��0V6JZ%ObV0MW8<EìCBE�4à �C�VV3>6JE²�B35E73>6JC�V0MW8<E C�603@603� j8B60V354MPE · 35ObV0MW8<E�� É S y CBE%4 É S ¹ &(�Ò8����W81��354 H��f�*M¹E%4781�ï�0M��>3��3��¹35ObV0MW8<E CBE%4 4�M¹;=35E��0M¹8<E%C��¹MWVª�è60354�Z%ObV0MW8<EïCBE%C��)�%�0M���MPE

y�y

Page 12: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0

1

2

3

4

5

6

7

8

9

10

Fre

quency

8 14 20 26 32 38 44 50 56 62 68 74 80 86 92 98Region Length

SDR LDR

�sM)�<Z7603 Í ��YIM+�8B6J473>60354@603��<MW8<E��Ì�¹35E��BV0XÄX%M��V8��B6DCB;

· 35ObV0MW8<E�� É S .$& É S Í CBE%4 É S ½ S�¶�6J8����0¢K�C��¹M¹4%C�V0MW8<Eî8<Z7VU8��Ë�0CB;� #�W3� j3>6�È8B6D;�CBE%Ob3�8���4%3>KB3��W8� j354ñE735Z76JC���E73>Vª��8B6J\$�M+���0Z%;¥;�C�6JM)�>354 M¹E · 35ObV0M¹8<E É S É CBE%4 V0X735MW6QV3��VQ603��0Z��WV��8<E CBE M¹E�473� j35E%4735E�VÐ/�Y[9 4%C�V0C�H�C��3ÌC�6036�0X781�*E MPE· 35ObV0MW8<E É S Ô�S(�-MPE%C����)��&e8<Z7V0Ob8<;=3���8��R�¹C�6�B3Ë�0O>C��W31C- � ��PM¹O>C�V0MW8<E,V8IVª��8U6J35C��|0!�¹M)�Ò3ß %6J8BV35M¹E,4�C�V0C�H�C��3���C�603Ë %6J3��35EgV354MPE · 35ObV0MW8<E É S Î S

Ñ���� �?����(F�.�*��J��.���̨%OkÒ%O@1�.@QP�@�(��Ó@���ÔXO��� �+�*@$�.���,u@1�\�.�+�*�3*X73��35C�6JOJX CBE%4ñCBE%C��)�%�0M��I8<EñV0X%3�2�Y,Å�4%C�V0CÌH�CBE7\î473��0Ob6JMWHj354¾M¹E · 35ObV0M¹8<E¾.NS y %608u4%Z%Ob354¾CÄ4%C�V0C�H�C��03�8�� ½ . �608BV35M¹E��&X%C�KNM¹E���Ob8<E%{�6J;=354Ì4%M+�8B6J473>60354Ï603��<M¹8<E��&8��-4�M|Á�3>6J35EgV:�0M)�>3��5S · V0Z%4���8��-V0X73/�W35E��BV0X��&8���V0X%3Ô4%M��8B6J4%3>603546J3��<MW8<E��!M¹EÌV0X�M��14%C�V0C�H�C��3�Ð@�-M��<Z7603 Í Ó�6J3��0Z��WV354ÄM¹Ex�03� �C�6JC�V0MW8<E@MPEgV8�4%M+�SR}8<MPEgV:�0Z7H#�3>V�1H�C��354@8<EÄV0X735MW6��¹35E��BV0X��

0 · X78B60V!Y[M��08B6J473>60354Ä9*3��<MW8<E���Ð · Y[9,Ó&X%C5KuM¹E�� Î 0 Í Ö:Ob8<E��35O>Z7V0M¹KB3Ô603��0M¹4�Z73���&7CBE%40 /�8<E��:YIM+�8B6J473>60354Ä9*3��<MW8<E���ÐÈ/�Y[9GÓ&Ob8<E��JM��V0M¹E��=8��s;=8B603�V0X%CBE Í Ö=603��JM¹4%Z73��>S3!X73:/�Y[9(4�C�V0C�H�C��3/�&C��!Z��354ÄMPEÌV0X%M��:�V0Z%4��:C��!C��8<Z%6JOb3U8��-4�M��8B6J473>614%C�V0C��Ò8B6Ì %6J354%M¹ObV8B6!473>KB3��W8� );=35EgV>S

��V!Ob8<E��0M+�V�18��sV0X73��3��NZ735E%Ob3��!8�� É %608BV35M¹E����sY,»IR.V8� �8<M+�8<;=3>6JC��3����&73��¹8<E��<C�V0MW8<Ex�lCBObV8B64µ�&��¹CBObV8��3Ô8� j3>608<E6J3� %603���8B6i&�V8<;�C�V8îH�Z��0X��9�V0Z%E�VÔKuMW6JZ��UOb8<C�V�&�C- j8� %V8��0M+�Ô603��<Z��PC�V8B6*Å&O��|0�À�CBE%4 O>C��¹O>M¹E735Z76DM¹E�Sw3!X%3¥4%C�V0C�H�C��3Ob8<E�V0CBM¹E�� y & Íe½ .�8B6J4%3>60354@CBE%4 Í�y Ö:4%M��8B6J4%3>60354Ï603��0M¹4%Z%3���&%�È8B6IC�V8BV0C���8�� y & Î�É .NSWS3!X73U4%M��8B6D473>60354� �C�60V��8���V0X%3Õ/�Y[9 4%C�V0C�H�C��34��3>603UZ��354ÌV8��B35E73>6DC�V3/ �C�VV3>6JE��1Ob8B6J603��z j8<E%4%M¹E���V8�4%M��08B6z0

4%3>60354Ì603��0M¹4�Z73��>S�3�8¥8BH%V0CBM¹EÄ4%C�V0C��03>V�:�*MWV0XÄC�603� �603��35E�V0C�V0MWKB3��0CB;� #�W3[8���8B6J4%3>60354Ä603��0MP4%Z73��Ú�È8<Z�E%4ÄM¹EÄE%C�V0Z76J3�&C��+�u8B6J473>60354� �C�VV3>6DE�����3>603:�B35E73>6JC�V354w�È608<;áC[6JCBE%478<;^�0CB;� ��W318���3���Z%35E%Ob3����Ò608<;^»*6�� .�YQS · 3>KB3>6DC��7H�C��¹CBE%Ob3544�C�V0Cx�3>V�4��3>603��B35E73>6JC�V354 Z��0M¹E��ÌC�VV6JMWH)Z7V3��UM¹E��Ò8B6J;�C�V0MW8<EîC5KB3>6DC-�B354$8LKB3>6�K�C�6JMW8<Z��,�0M)�>3���M¹E%4781���>S��78B6�35CBOJX�03���Z735E�Ob3/ j8��0MWV0MW8<E�&uO>C��¹O>Z��PC�V354@8�KB3>6¥�*M¹E%4%8i���&8���C��z j35O>M|{)O,�0M��>3�&��È8��+�W8i�*MPE��=C�VV6JMWH�Z7V3��Ì��3>603��B35E73>6JC�V354��

0 ¹ Ö�C�VV6JMWH)Z7V3��!Ob8B60603�� �8<E�4%M¹E���V8�V0X73ÔOb8<;� �8��JMWV0MW8<EÌ8��s35CBOJXè8���V0X%3 ¹ Ö� j8���0MWH#�W3ICB;¥M¹E78=CBO>M¹4���D0 C5KB3>6JC-�B3�UeÇ H Jz��È%=�>SU�ÇX&�O>C��PO>Z��¹C�V354@Z��JM¹E���V0X73�T4�NV3E0nYI8�8��PMWVV�W3��0O>C��¹3w¸ ¹ . º D0 C5KB3>6JC-�B38<ÌCÞ�?�ýE?BÆ×?B>@Çw¸ Íe¹Xº D)CBE%40 V!��8:C�VV6JM¹H�Z7V3��!Ob8B606J3��z j8<E%4%M¹E��QV8�V0X73«ÖïCBE�4Z×ØUeÇ H Jz��È�U$��ýE?���±��-±wCE;#>B�4¸ y Ö º Sy�¹

Page 13: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

* Ordered

o Disorderedο

ο ο ο ο ο ο οο

οο

οο

οοο ο

οο

οοο

οοοοοοοοοο

οο

ο οοο οοοοοοο

ο οοοο

οο

οοο ο οο οοο οο οο οοο

οο οοο οοοοοοοο

οοοοοοοοο

οοοοο

∗∗

∗∗∗

∗ ∗∗

∗∗∗

∗ ∗∗

∗ ∗ ∗∗ ∗∗

∗∗

∗∗∗∗

ÙÈÚ*Û

* Ordered

o Disordered

οο

οο

οο

ο οο ο

οο

οο

ο

ο ο

οοο

οο

οοο

οο

ο οοοο

οο ο

οοο

οο

οο

οο

οοο ο

ο

∗∗∗

∗∗

∗ ∗

∗∗

∗∗∗

∗∗

∗∗

∗∗∗ ∗

∗∗∗∗∗

∗∗∗∗∗

∗∗

∗∗

∗∗

∗∗

∗∗

∗ ∗

∗∗∗ ∗∗

∗∗

∗ ∗ ∗∗∗

∗∗ ∗

∗∗

∗∗∗

∗∗

∗∗∗

∗∗

∗∗

∗∗

∗ ∗∗

∗∗

∗∗∗

∗∗ ∗

∗∗∗

∗∗ ∗ ∗

∗ ∗

∗∗

∗∗ ∗

∗∗

∗∗

∗∗

∗∗∗

ÜSÝQÞ* Ordered

o Disordered

ο οοοο

οο

οο

ο

οοοοοοο

οο

οο

οοοοο

οο

οοοοο

οοοο

ο

οοο οο οοο

οοο

οοοο

∗ ∗

∗∗∗

∗∗ ∗

∗ ∗

∗∗

∗∗ ∗ ∗

∗∗

∗∗

∗∗

∗∗

∗∗∗

∗∗

∗∗ ∗∗∗

∗∗

∗ ∗∗∗ ∗

∗∗

∗∗

ßÈà�á

o Disordered* Ordered

∗∗

∗∗∗∗∗

∗∗ ∗

∗∗∗∗ ∗∗∗∗∗∗

∗∗∗ ∗

∗∗∗∗

∗∗∗∗∗ ∗

∗ ∗∗∗∗

∗∗∗

∗∗

∗∗∗∗

∗∗

∗∗

∗∗

∗∗

∗∗

∗∗∗

∗∗

∗∗∗

∗∗∗∗

∗ ∗∗ ∗∗

∗∗

∗ ∗ ∗

∗∗ ∗∗

∗∗∗∗∗∗∗∗∗ ∗ ∗ ∗∗ ∗

∗∗

∗ ∗ ∗

∗∗ ∗∗∗∗∗

∗ ∗∗∗∗∗

∗∗

∗ ∗∗∗∗

∗∗∗∗

∗∗∗

∗∗∗∗

∗ ∗∗∗∗∗

∗∗∗∗∗∗

∗∗

∗∗∗

∗∗∗

∗∗ ∗

∗∗

∗ ∗ ∗∗

∗∗∗

∗∗

∗∗∗∗

∗∗∗ ∗

∗∗∗∗

∗∗∗ ∗

∗∗∗∗

∗∗ ∗

∗∗∗∗

∗∗∗∗∗

∗∗∗

∗∗

∗∗

∗∗

∗∗∗∗∗ ∗

∗∗∗∗

∗∗∗∗∗∗∗∗∗

∗∗

∗∗ ∗

∗∗∗

∗∗∗

∗∗

∗∗ ∗ ∗∗∗∗

∗ ∗∗

∗∗∗∗

∗∗∗

∗∗∗

∗∗

∗∗∗∗∗∗∗

∗ ∗

∗∗∗∗∗

∗ ∗∗∗ ∗∗∗∗

∗∗∗∗∗∗∗∗∗

∗∗∗ ∗ ∗ ∗∗∗ ∗

∗∗∗∗

∗∗

∗∗

∗∗∗∗ ∗

∗∗∗ ∗

∗∗∗∗∗ ∗

∗ ∗∗ ∗∗

∗ ∗∗

∗∗∗∗

∗∗

∗∗

∗∗∗∗∗

∗ ∗∗∗∗∗

ο οοοο

οο

ο

ο

οο

ο

ο

οο

οο

οο

οο

οοο ο

ο

οο ο ο

ο

οο

ο ο

οο

ο

ο

ο οο

οοοο

οο

ο

ο

οο

ο

οοο

οο

οοο ο

ο

οο

οοο

ο

οο

οοο

ο

οο

ο οοο

οο

ο

ο

οο

ο

ο

οοο

ο

οοο

ο

οοο

ο

ο

ο

ο

οο

ο οο

οο

οοο ο

οο

οοο ο ο

οοο

οο

ο

ο

ο

οοο

ο

οο ο

ο

οο

ο

ο

ο ο

ο οο

ο

οο

οοοοο

οο

οοο ο

οο

ο

οοο

οο

οο

ο

οο

ο

οοοο

ο

ο ο

ο

οο

οοοοο

οοο

οο

οοοο οο

ο

οο

ο

οο

ο

οο

οο

οο οοο

ο

ο

οο

ο ο

οο οοοοοο

οο

οο

ο

οο

ο

ο

οο οο

ο ο

οο οο

οοοο

οο

οο

οο

ο

ο

ο οο ο

οοο

οοοοοο

οοο

οοο

οο ο

ο οοο

ο

οο

οοο

οο ο

οοο

οοοο

οοο

οοο

ο

οο

οο

οο

οο

οοο

οοο

ο ο

οοοοο

οο ο οο

οοο

ο

ο

ο ο

ο

ο οο ο

οοο

οοοοο οο

οοοο ο ο

ο

οοο οο ο

οοοοο

ο

οο οοοο

οοο

οοο

οοο

ο

ο οοοο

οο

οο

οο

ο

ο

οοοο

ο

οοοοοο ο

ο

οο

οο

ο

οο

ο

ο

ο οο

οο

οοο οο

ο

οοο

οο

οοοο οο

οο

οο

οοο

ο

οοο

ο οο

οο

οοο οο

ο

ο

ο

ο οο οοο

ο

ο

ο ο

οο

οο

οο ο οο

οοο

ο

ο

ο

ο

οο

ο

οοο

οο

ο οοο

ο

οοο οοοο

οο

οο

οο

οο

ο

οο

οο

ο οο

οοο

οο

οοο

οοοοο ο

οο

οοο

οοοο

οοοο

οοο

ο ο

οο

οοο

οο

οο

ο

ο

οο ο

ο

ο

ο ο

ο

οο

ο

ο

ο

ο

ßÈâ1áã£ä³å�æ+çéè?ê�ë?ìLíTîðï+çòñ�óôè à�õ ä³ñ�ö�÷«ñ.ø3ñ.ç â è|çéè âoù ö âiâ ä�÷¦ñ.ç â è|çéè â ï ù\õ¦õ è|çòö+÷|ë ßÈù*á í ù.ú«û�ßSü1áÐõ ñ.ï1ñ�ä�÷¦ñ�ýaè|ç ù ÷¦è?þéþ ûTßÈà�áÿ à�������û�ßÈâ$áLù���� ýañ � è à æ � è�÷Iä�ö õ� è� ��� â+ù\õéù\ü�ù ÷¦è��

� � ä�÷�ï+çéñ â æ à è�÷ ùOõ ñ õéù�� ñ.ø���� ù\õ¦õ çÃä ü æ õ è�÷ û çéè|ï+çéè�÷éè�ö õ ä�ö+å¹è ù.à�� ÷¦è���æKè�ö à è6ïQñ�÷éä õ ä³ñ�ö ù ÷ ù ïQñ�ä�ö õ ä�ö ù ��� �â ä�ýaè�ö+÷éä�ñ�ö ù�� ÷¦ï ù.à è�� � � èaçéè�÷éæ �³õ ä�öKå â+ù\õéù ÷¦è õ ÷�� è|çéè ü�ù���ù ö à è âOõ ñ �+ù�� è õ� è ÷ ù ýaèÄö�æ+ý ü è|çÐñ.ø ñ.ç â è|çéè â'ù ö ââ ä�÷¦ñ.ç â è|çòè â ï ù\õ¦õ è|çòö+÷������� "!$#&%('�)+*&,-'�.0/21�3547698�:<;>=<[email protected],B6DCE,GFIHKJã+ñ.ç ùOâ ä�÷ õ çòä ü æ õ ä³ñ�ö ù ö ù��ML ÷òä�÷­ñ.ø¨ñ.ç â è|çéè âÓù ö âiâ ä�÷¦ñ.ç â è|çòè â ïQñ�ä�ö õ ÷«ä�ö õ� èN��� ��â ä�ýaè�ö+÷éä�ñ�ö ù�� ù\õ¦õ çÃä ü æ õ è6÷¦ï ù.à è ûï ù\õ¦õ è|çòö+÷��Lè|çéè�å.è�öKè|ç ù\õ è â øSñ.ç ù��O� ÷¦è���æKè�ö à èIïQñ�÷éä õ ä�ñ�ö+÷ ß ñ.ç â è|çéè â ù ö â â ä�÷¦ñ.ç â è|çéè â$á ä�ö õ� èP ��� â+ù\õéù\ü�ù ÷¦è�� ã£ä³å �æ+çéè�÷�ê ùÐõ� çéñ�æKå � ê â ÷ � ñ>� õ� çéè|è â ä�ýaè�ö+÷òä³ñ�ö ù�� ï+çéñ�ó¦è à�õ ä³ñ�ö+÷�ñ.ø õ� è�÷¦è�ïQñ�ä�ö õ ÷�ø>ñ.ç õ� çéè|è�ñ.ø õ� èQ$��� â+ù\õéù\ü�ù ÷¦è�R ÷

S�T

Page 14: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0U

0.2U0.4U0.6U0.8U

1V

1.2V1.4

1.6V1.8

2 3W

4 5X

6Y

7 8Z

9[

10 11 12 13 14 15 16 17

Number of features selected

Mah

alan

ob

is d

ista

nce

9 residues

15 residues

21 residues

W\

indow size

�sM)�<Z%603 É ����0��Ò35C�V0Z7603��03��W35ObV0MW8<EÄ603��JZ��WV�&8<EÄV0X76J3>3�4%C�V0C��3>V���È8B6 ¹ vO�»v y Ô;�8��W35O>Z��W3���CBE�4��Ò8B6�V0X73Ì��X78��W3!4%C�V0C�H�C��03BS(3!X73��3Ì�B6DC- �X��(��3>603!8BH�V0CBM¹E7354¥Z��0M¹E��U2�6DM¹E%O>M) �C���¶�8<;� �8<E%35EgV��R�E%C��)0�%�0M��:8��UV0X73 ¹XÍ 0n4%M¹;=35E��0MW8<E%C��I4%C�V0Cö�3>V�ÌCBE%4 V0X%35E �608�R}35ObV0MPE��$35CBODX< �8<MPEgV:8<EgV8 V0X73"{�6��V:V0X7603>32 %6JM¹E�O>M) �C��Ob8<;� �8<E%35EgV�>S�3!X734�B6JC- �X��1X%C5KB3,H�3>35E@608BV0C�V354@V8w�03>3ÔV0X73��3� )C�6JC�V0MW8<EÄHj3>V!��3>35EGO��PC���3��1Hj3>VV3>65S»*8BV0M¹Ob3UX781�/&%M¹E:V0X73[O>C��3U8���M¹E%4�MWKNMP4%Z%C��% %608BV35MPE���&NV0X73, �8<MPEgV��Ob8B60603��z j8<E%4�M¹E���V8�8B6J4%3>60354ÌCBE%4Ì4%M��8B6J4%3>60354

�03���Z735E�Ob34 �8��JMWV0MW8<E��Ë�3>35; V8��lC����jM¹E�V8���3��+��4%M|Áj3>6035EgV0MPC�V354Ì603��<MW8<E��Ë�*M¹V0X%M¹E:V0X73ÔC�VV6JMWH�Z%V3/�z �CBOb3BSß3!X�M��&4%M|Áj3>6z035E�V0M¹C�V0MW8<E¾M��[E78BVUC��UO��W35C�64��X735EGV0X%3N j8<M¹E�V�¥�È608<; C��+��;=8��¹35O>Z��W3��[M¹EèV0X73a/�Y[9ú4%C�V0C�H�C��03�C�6J3N �603��35E�V354ñM¹EèC�JM¹E����W3,�B6JC- �XöÐ@�sM)�7S ½ 4#ÓDSÚ3!X%M��:�0Z� � j8B60V�&V0X73/ %6J8� �8��JC���8���E78BV!8<E��)�Ì473>KB3��W8� )M¹E���C��B35E73>6DC��n %60354�M¹ObV8B6!V6JCBM¹E%3548<EÏC�����V0X73¨/�YI9ë4%C�V0C%&uH�Z%V�C����8* %608u4%Z%O>M¹E��4�lCB;�M����e0!�z j35O>M|{�OË %60354%M¹ObV8B6���Z��0MPE��Ô;,Z��WV0M) ��W3Ì�03���Z735E�Ob3�C��¹M)�<E�;=35EgV�8<E§C2�lCB;�M��)�$8��� %608BV35MPE���&�M¹Eï8B6J473>6�V8ñV0C�\B3GCB4%KeCBE�V0C-�B3@8���CBE§C- � �C�6035E�V�)� 35C��0MW3>6�4�M|Á�3>6J35EgV0M¹C�V0M¹8<E Hj3>Vª��3>35E�lCB;�M����e0!�z j35O>M|{�O*8B6J4%3>60354@CBE%4Ä4%M+�8B6J473>60354Ì6J3��<MW8<E��>S3!X73��B6JC- �X��/�0X781�*E M¹E9�sM)�<Z76J3 ½ C����8`�0Z����B3��VÔV0X73�3EÄ7M��V35E�Ob3�8��14%M|Áj3>6035EgV[Vª�� j3��Ô8��14%M+�8B6J473>6�&�MP;� ��)�uM¹E��

V0X�C�V�V0X73¥�ÒCB;¥M��)��0!�z j35O>M|{)OË %60354�M¹ObV8B6��(��8<Z��¹4w j3>6JX%C- ���Hj3!KB3>6����B8�8u4ÏC�V�473>V35ObV0MPE��,V0X%35MW6�81�*E¥Vª�� j3�8���4%M��8B6J4%3>6H)Z7V�M����¹M¹\B3��)�$V8$;¥M���=8BV0X73>6¥V!�$ �3��5S 3!XNZ���&&M¹E 8B6J473>6¥V8f %60354�M¹ObV��W8<E�� 4%M��08B6J473>6�M¹EF�B35E%3>6JC���ÐlC��:V0X73x/�Y[9 �60354%M¹ObV8B61C�VV35;� %V�*V8�478�Ó�&%CBEÄM¹E�V3��B6JC�V0MW8<EÌ8��'�ÒCB;¥M��)��0!�z j35O>M|{)O: %6J354%M¹ObV8B6��&V6JCBMPE7354Ï8<E6�ÒCBMW6��)�¥4%M|Áj3>6035E�V&\NM¹E�4��8��&4%M��08B6J473>6�&�C��Ô3EÄ% ��¹CBMPE7354¾M¹E · 35ObV0MW8<E ½ &'�0X78<Z��¹4îHj3=Ob8<E��0M¹4%3>60354�S�3!X%M��G��8<Z��¹4¾V0C�\B3:CB4%KeCBE�V0C-�B3�8��Ú �8����0MWH��)��JZ� j3>6JMW8B6�&uC��WHj35MWV:�W8uO>C��¹M)�>354�&� j3>6�Ò8B6J;�CBE%Ob3[8��sV0X734�lCB;�M��)��0!�z j35O>M|{)O¥ %60354�M¹ObV8B6��>S¶&C�»ëCBE%4=V8� j8<M��8<;=3>6DC��3Ì��'��3>6J3��3��W35ObV354ÏC��( %6J8BV8BV!�$ �3� %608BV35M¹E��(�È8B6(�lCB;�M����e0!�z j35O>M|{�OÚ�PC�H�3��¹354=4%C�V0C�H�C��3��

Ob8<E��V6JZ%ObV0MW8<E�S(3!X%M��14735O>M+�0MW8<E6�&C��!H�C��354@8<EÄV0X735MW6Ì�lZ%E%ObV0M¹8<E��1M¹E�KB8��WKNMPE��=4%M|Áj3>6035EgV1\uM¹E%4���8���;=8��¹35O>Z��¹C�616035Ob8��-0E�MWV0MW8<E��*¶&C�»ÇH�MPE%4��[V8` %6J8BV35M¹E���&7�*X73>6035C���V8� �8<M+�8<;=3>6JC��3w���H)M¹E%4��[V8GY,»IR�S y .x %6J8BV35M¹E��ÔX78<;�8��W8��B8<Z��ÔV8¶1C�»�CBE%4 y�¹ X78<;=8��W8��B8<Z��*V8:V8� �8<M+�8<;=3>6JC��3*��Ë��3>6J3*�3��W35ObV3542�Ò608<;�V0X%3 · �*M+��!2�6J8BV35M¹EG4%C�V0C:H�CBE7\ÌV8� �3>60�Ò8B6J; ;,Z��WV0M) ��W3��3��NZ735E%Ob3ÌC��¹M)�<E�;=35EgV��&7�Ò608<; �*X%M¹ODX9�ÒCB;¥M��)��0!�z j35O>M|{)O��¹C�Hj3��W354 4�C�V0C�H�C��3��N��3>6J3� %6J8N4%Z�Ob354�&�C��3EÄ% ��¹CBMPE7354ÔM¹E · 35ObV0MW8<E*.NS ¹ S�R&VV6JM¹H�Z7V3��7�B35E73>6JC�V0MW8<E*�È6J8<;(V0X73��03�4%C�V0C�H�C��03��-M+��O>C�606JM¹354Ô8<Z7V'�0CB;=3�C��'�Ò8B6�V0X73L/�Y[94�C�V0C�H�C��3�&% %608u4%Z%O>M¹E��IH)C��¹CBE%Ob354¥4�C�V0C��3>V�&X%C�KNM¹E��Ô8B6J473>60354w �C�VV3>6JE���8BH%V0CBM¹E%354��Ò608<;ó»�6�� .�Y CBE%4Ï4%M��8B6J4%3>60354 )C�VV3>6JE��:�B35E73>6DC�V354s�Ò608<; V0X734�lCB;�M����e0!�z j35O>M|{�O�4%C�V0C�H)C��3��>S

yEÍ

Page 15: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0]

0.5]

1

1.5

2

2.5^

3_

3.5_

4`

4.5`

5a

0]

10 20 30_

40 50a

60b

Window size

Mah

alan

ob

is d

ista

nce

�sM)�<Z%6032Ô�� y ÖX0��Ò35C�V0Z76039�3��W35ObV0MW8<E 603��0Z��¹V��8<E 4%C�V0Cf�B35E%3>6JC�V354ëZ��0M¹E��f�*M¹E%4781�g�0M)�>3��:6JCBE��<MPE��¾�Ò608<; Û V8 ½%y6J3��0M¹4%Z73��

Ñ��>� c �������jÒE£�9dK�ØE£��C��$J��.�����fehg�GI�+�*�V!������.(3�8¥�03��W35ObV�CG�0Z%MWV0C�H#�W3��*M¹E%4%8i�f�0M��>3ß�Ò8B6�C�VV6JMWH)Z7V3��n�B35E73>6DC�V0MW8<E�&-�È35C�V0Z%603Ú�03��W35ObV0MW8<EÔ3EÄ% j3>6JM¹;=35E�V�n��3>603� �3>6��È8B6J;�3548<E=4�C�V0C/�3>V�� %6J8N4%Z�Ob354QZ��0M¹E��G�*M¹E%4%8i�F�0M)�>3���6DCBE��<M¹E��,�Ò608<;íÛIV8 ¹%y 603��0MP4%Z73��>S'Å�6DCBE%OJX�CBE�4�H�8<Z�E%4��35C�6JOJX���C��Z��354GV8�{)E�4GV0X73¨�ñ8� %V0M¹;�C��7�Ò35C�V0Z7603��[CBO>Ob8B6J4%M¹E��:V8ÌV0X73�ÑîCBX%C��¹CBE78BH�M+��4%M+�V0CBE%Ob3�Ob6JMWV3>6JMW8<E�S¥3!X%M+�� %6J8NOb354%Z%603�&C��*4%8<E734�È8B6*H�8BV0X@V0X73­/�Y[9.CBE%4ÄV0X734�lCB;�M����e0!�z j35O>M|{�OI4�C�V0C��3>V�>Sß�sM)�<Z%603 É �0X781���!V0X%3U603��0Z��WV�!8BH%V0CBM¹E7354Ä8<EV0X%603>3w¶&C�» 4�C�V0Cx�3>V�ÔZ��0MPE��ÏC�VV6DMWH�Z7V3��UOb8<;� )Z7V354¾8�KB3>6/��M¹E%4781���I8��ËÛ$& y�½ CBE�4 ¹%y 603��0M¹4%Z%3����Ò8B6T� 6JCBE��<M¹E���Ò608<; ¹ V8 y ÔN�Ò35C�V0Z7603��>S

R¥��3EÄ% �35ObV354n&NV0X%3¥ÑîCBX%C��¹CBE78BH�M+��4%M+�V0CBE%Ob3��B6J8i���Ë�*M¹V0X�V0X73[E�Z�;�Hj3>6�8��7�3��W35ObV354��È35C�V0Z%603���&uH�Z7V�MWV�ß�B6J8i�!V0X���W8i����478i��EèC�V[C�Hj8<Z7V � � y Ö%&jMP;� ��)�uM¹E���V0X%C�VIV0X73>603QM��*C��0;�C����¹3>6*M¹;� %6J8�KB35;=35E�VIMPEs�3� �C�6DC�H�M��¹MWVª�:H$�@CB4%4%MPE��;�8B603w�Ò35C�V0Z7603��,Hj3��B8<E%4 y ÖèV8GV0X73��3��W35ObV354ö�0Z7H��3>V>Sx3!X�M��U603��0Z��WV4��C��QOb8<E��0M+�V35EgV���î6J3� �35C�V354[�Ò8B6�Hj8BV0X V0X73/�Y[9(CBE%4ÄV0X%3ÔV8� j8<M��8<;=3>6JC��03Ô4%C�V0C��3>V�>S�-M��<Z7603 É C����8 �0X781����X78i�ÇV0X736ÑèCBX�C��¹CBE78BH�M��Q4%M��0V0CBE%Ob3w�B6081�����*MWV0X$V0X73ÌE�Z%;,Hj3>6�8��!6J3��0M¹4%Z73��,M¹E%O��¹Z�47354

MPEñV0X73w��M¹E%4781�/&7�8îCB4%4%MWV0M¹8<E%C��s3EÄ$ j3>6JMP;=35EgV����3>6J3:O>C�606JM¹354ñ8<Z7V�V8î473>V3>6J;�MPE73¥X781� V0X73��3��W35ObV0MW8<EïOb6JMWV3>6JM¹8<EK�C��¹Z73��0O>C��W354¾��MWV0X9�*M¹E�478i�í�0M��>3BSÌR¥�ÒV3>6,473>V3>6J;¥M¹E%M¹E��ÌV0X%C�V y Ö`�Ò35C�V0Z7603��*��3>6J3:CBE$C- � %608� %6JMPC�V3��0M)�>3��Ò8B6�V0X73�Ò35C�V0Z7603`�03>V�&�V0X73 y ÖX0��Ò35C�V0Z7603"�3��W35ObV0MW8<EF �608NOb3�������C��� j3>6�Ò8B6J;=354ö�Ò8B6¥4%C�V0C9�3>V���*MWV0X C�VV6JMWH�Z%V3���Ob8<;� �Z7V3548LKB3>6*��M¹E%4781���U6JCBE��<MPE��`�Ò608<; ÛÄV8 ½%y 603��JM¹4%Z73��>S�3!X73wÑîCBX%C��¹CBE%8BH�M��Ô4%M+�V0CBE%Ob3¥M¹E�Ob6035C��354¾�¹MPE735C�6��)�"�*MWV0XñV0X73��M¹E%4781�²�0M)�>3�&uC��Ë�0X78i��E¥M¹E��-M��<Z7603,Ô4�È8B6�V0X73/¶&C�»�4%C�V0CN�3>V>S(3!X%M+��;=35CBE���V0X%C�V�&$�*MWV0X%MPE=V0X73*6DCBE��B3�8�����M¹E%4781��JM)�>3��w�V0Z�4%MW354�&Ë�¹C�6�B3>6��*M¹E%4781�g�0M)�>3G603��0Z��WV�¥M¹E§Hj3>VV3>6ÏO��PC���w�3� )C�6JC�V0MW8<E�S�R¥�<CBM¹E�&&V0X%M��=Hj35X%C�KNM¹8B6w�&C��:C����088BH#�3>60KB3549�Ò8B6UV0X73 /�Y[9úCBE�4¾V8� �8<M+�8<;=3>6JC��3�0!� �35O>M){)O,4�C�V0C`�3>V�>S�3!XNZ���&�CBEñC- � %6J8� %6JM¹C�V3��*M¹E�478i�^�0M)�>3=X%CB4V8ÄHj3��3��W35ObV354 H�C��354ñ8<EñMWV�[3EÁj35ObVÔ8<EñV0X%3� %60354%M¹ObV0M¹8<EG6JCBE��B3�&�C��U3EÄ% ��¹CBM¹E%354èM¹E · 35ObV0MW8<E Í S=Ró�*MPE%478i�^�0M��>38�� ¹%y 603��0MP4%Z73��¥��C��/�03��W35ObV3549�Ò8B6UV0X73��B35E73>6JC�V0MW8<E 8���C����s4%C�V0Cx�3>V��Z��354ñM¹EîV0X%M��,�V0Z�4���&n�0M¹E%Ob3=MWV, %6J8N4%Z�Ob3��ICO>C��PO>Z��¹C�V0MW8<E¥603��<MW8<E:H�M)�Ô35E78<Z��<X�V8�CB473���Z�C�V3��)��O>C- %V0Z7603�V0X73G %603��35E%Ob3�8���6JC�603ICB;�M¹E78�CBO>MP4���M¹E¥V0X73*KuM¹O>M¹E�MWV!�Q8��V0X%3Ë�0V0Z%4%MW354� �8��JMWV0MW8<E*�*MWV0X78<Z7V-Hj35M¹E��G�8G�PC�6�B31C��sV8,�PM¹;�MWV5�03>KB3>603��)��V0X%3Ú �60354%M¹ObV0MW8<E,6JCBE��B3�8<E=CBE�C5KB3>6JC-�B3E0!�JM)�>354 �608BV35M¹Ex�3��NZ735E%Ob3BS

y�½

Page 16: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

Ñ���g A �+@1�.�����#EH��C���J��������iehg�GI�+�*��!�������(3-C�H��W3 y �JX78i�.V0X73N�È35C�V0Z76J3��¥�3��¹35ObV354"�Ò8B6UC�����V0X%3Q4%C�V0C��3>V�G�B35E73>6JC�V354¾M¹EGV0X%M��G�V0Z%4��BS¥3!X73,4�C�V0C��3>VG�Ò8B6�V0X73�lCB;�M����e0!�z j35O>M|{�O�C�60H)MWV3>6�M��o�B35E73>6JC�V354��Ò608<;�V0X73G¶&C�» CBE%4=V0X%31V8� �8<M+�8<;=3>6JC��3�4%C�V0C/�3>V����X735E�Ob8<;,H�M¹E%M¹E���V0X73�lCB;�M����e0!�z j35O>M|{�O� %60354%MPObV8B6���&BC��s3EÄ$ #�¹CBM¹E7354QM¹E · 35ObV0MW8<E ½ S�7�CBODX�.10!�W3>VV3>6�Ob8u4731Ob8B60603��z j8<E%4���V8UV0X731Ob8<;� j8��0MWV0M¹8<E8���V0X731CB;�M¹E%8[CBO>MP4=603� %603��035EgV354�H$�,V0X�C�V�Ob8N473BS�3!X%3�8BV0X%3>6ß�3��W35ObV354�C�VV6DMWH�Z7V3���C�6031V0X%3�ÖèCBE%4u×@X��u47608� �X78BH)M¹O;�8<;=35EgV�5S

Y[C�V0C��3>V · 3��W35ObV354`�Ò35C�V0Z7603��¶&C�» 3���6 ÊIM�� · 3>6 3�6 2�X73 Ò�C�� ¶Ú�%� µ,�¹Z R*6�� ×n0n;=8<;=35E�V

V8� j8<M��8<;�3>6JC��3 3���6 µ,�)� · 3>6 RG�¹C RG�0E /n�%� ¶Ú�%� 2�608 RG�z Ö50n;=8<;=35E�V/�Y[9 3���6 Ñè3>V · 3>6 3�6 2�X73 /n�%� ¶Ú�%� µ,�¹Z R*6�� RG�¹C¹ 0��lCB;�M��)�ÏC�60H�MWV3>6 3���6 ÊIM�� · 3>6 RG�¹C 3*X76 /n�%� ¶Ú�%� µ,�¹Z R*6�� ×n0n;=8<;=35E�V

3�C�H#�W3 y � · 3��¹35ObV354x�È35C�V0Z%603��>S�.10!�W3>VV3>6[Ob8u473��1603� %6J3��35EgV!Ob8<;� �8��JMWV0MW8<EÌ8��sV0X73�Ob8B606J3��z j8<E%4%M¹E���CB;�M¹E%8�CBO>M¹4��

Ñ��>Á A �+@1�.�����jehgH�.��@�J��������kehg�GI�+�*�V!#�$����(

0l

0.5l

1

1.5

2

2.5

3m

3.5m

4n

1 2 3m

4 5o

6p

7 8q

9r

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Principal component

Eig

enva

lue

�sM)�<Z%603 Î ��7�M��B35EgK�C��¹Z73��!Ob8<;� �C�6JM��8<E`�È8B6*4%35O>M¹4%M¹E��Q8<EGCBEGC- � %608� %6DM¹C�V3UE�Z%;,Hj3>618��o %6JM¹E%O>M� �C��)Ob8<;� �8<E%35EgV�2�6JM¹E�O>M) �C���Ob8<;� j8<E735E�V�,CBE�C��)�$�JM��4�&C��,O>C�606DMW354 8<Z7V,8<E$V0X%3�/�Y[9 CBE%4f�ÒCB;�M+�)�e0!� �35O>M){)O�4%C�V0C"�03>V��&o�*X%M¹ODX

��3>603¥E%8B6J;�C��¹M)�>354 V8`�>3>608è;�35CBE$CBE%4 Cs�V0CBE%4%C�6J4$473>KNMPC�V0MW8<Eñ8�� y Hj3��È8B6J3� %603� %6J8NOb3���JM¹E��7S�3!X73¥35M)�B35EgK�C��¹Z73��8BH�V0CBM¹E7354*�È8B6-V0X73̶&C�»§4%C�V0CG�3>V-C�6J3Ú�0X%8i�*EQM¹E��sM)�<Z%603 Î S�3!X73�603��¹C�V0MWKB3&X%M)�<X�KeC��¹Z%3�8��%V0X73ß{�6��V5{�KB3�35M)�B35EgK�C��¹Z73���JZ����B3��V354ÄV0X%C�V1CQ60354%Z�ObV0MW8<EÏV8�C ½ 0n4�M¹;=35E��0M¹8<E%C��#� �CBOb34�z �CBE%E7354ÏH$�¥V0X73UOb8B606J3��z j8<E%4%M¹E��,35M)�B35E�KB35ObV8B6��*Ob8<Z��P4 �608N4�Z%Ob3,C:6035C��8<E%C�H#�W3� %6J354%M¹ObV8B6�&�H�Z7V�V0X73QC�KeCBM+�¹C�H��W3Q4%C�V0CÌC����8ÌC����W8i��354"�È8B6UC:60354%Z%ObV0MW8<EèV8 y Ö:4�M¹;=35E��0M¹8<E��C���E73>3547354 �Ò8B6ÔC6�ÒCBMW6UOb8<;� )C�6JM��8<E¾V8 y ÖX0��Ò35C�V0Z7603��3��W35ObV0MW8<E�S�R¥�<CBM¹E�&n�0M¹;¥M��¹C�6I603��0Z��WV�G��3>603=8BH%V0CBM¹E%354 �È8B6UV0X73V8� j8<M��08<;=3>6JC��3�CBE�46/�Y[9#4�C�V0C��3>V�>S

y�É

Page 17: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

7�KB35E V0X78<Z��<X V0X%M���CBE%C����$�0M+���&C��w j3>6�Ò8B6J;=354§8<E V0X73"�*X78��W3G4�C�V0C[�3>V��&:�È35C�V0Z76J3è3EÄuV6JCBObV0MW8<E ��C��6�¹C�V3>6O>C�6J6JMW354è8<Z7VIMPE%473� j35E%4735E�V�)�Ì8<Eî35CBOJX¾8���V0X73*{�KB3�V6JCBM¹E�M¹E��w�0Z%H��3>V�IZ��3542�È8B6UOb608�����K�C��¹M¹4�C�V0MW8<E�&)C��I3EÄ% ��¹CBM¹E%354MPE · 35ObV0MW8<E ½ S�3!X73=35M)�B35E�KB35ObV8B6��,8BH%V0CBM¹E7354ñV0X%608<Z��<XñV0X%M+�, %608uOb3���4��3>603¥Z��354 V8@3EÄNV6DCBObV y Öx�Ò35C�V0Z7603����È608<;V0X%3U8B6JM)�<M¹E%C���4�C�V0C��3>V>S

Ñ��>Ñ Á1D�������(�(xÂÄ@�C��V @1�������kesg�GI�+�"��!�������(F[Z7V�0¢8��h0!�0CB;� #�W34 %60354%MPObV0MW8<EÌCBO>O>Z76JCBOE�

YIC�V0C��0Z7H��03>V ¬�=>t u#��È%��?+���-±wCEJz=X��C v7~�wC Î%y Æ Ô-Û�Æ Î Ö*ÆH Î Ö*Æ Ô-Û�Æ ÎXÍ ÆO Î Ö*Æ Î Ö*Æ Ô Î Æ4 Î%y Æ Ô-.�Æ Î�¹ Æ3 Î%y Æ Ô�Ô.Æ Î%y Æ

R�KB3>6JC-�B3 Î Ö*Æ Ô Î Æ Î%y Æ· V0CBE%4�C�6J4Ä473>KuM¹C�V0MW8<E x ¹ Æ x4.�Æ x ¹ Æ»¥»�R�6JOJX�MWV35ObV0Z7603 y ÖX0 y ÖX0 y y ÖX0 y ÖX0 y y ÖX0 É 0 y

3-C�H��W3 ¹ � ½ 0nOb608���IK�C��¹M¹4%C�V0M¹8<E�&�8<Z7V�0¢8��h0!�0CB;� #�W3QCBO>O>Z%6JCBOE�`�Ò8B6,�JM¹E����W3�E%35Z76JC���E%3>V!��8B60\s %6J354%M¹ObV8B6��*8<Eî4�C�V0Cw %6J3E0 �608NOb3����354x�*MWV0X6 �6JM¹E%O>M) )C��)Ob8<;� j8<E735E�V�!CBE%C����$�0M+�/Ðl2Ú¶&R4ÓDS

3�8��3��¹35ObV*CBEÄC- � %608� �6JM¹C�V3U4%M¹;=35E��0MW8<E%C��¹M¹V!�=60354%Z�ObV0MW8<EÌV35OJX%E�M���Z%3�& ½ 0nOb608���1K�C��¹M¹4%C�V0M¹8<E:3EÄ% j3>6JM¹;=35E�V�1Z��0MPE��4�C�V0CÄ8BH%V0CBM¹E7354$V0X7608<Z��<X H�8BV0X¾�È35C�V0Z76J3w�3��W35ObV0MW8<E CBE%49�Ò35C�V0Z7603�3EÄuV6JCBObV0MW8<E V35OJX�E%M��NZ73��4��3>603:O>C�606DMW354ñ8<Z7VÔ8<EC��+�7�0MPE����W3E0nE73>Vª��8B60\" %60354%MPObV8B6��>S43�C�H#�W3�� ¹ CBE�4 .��0X%8i��V0X73�C5KB3>6JC-�B3��B35E73>6JC��¹M��5C�V0MW8<Eî8<Eè8<Z%VI8��Ú�0CB;� ��¹3Q4%C�V0C�Ò8B6=V0X7603>3Ì6JZ�E���8<E 35CBODX§8��*V0X%3�{)KB3Ì4�M��SR8<M¹EgV,V3��V��3>V��&�603� %603��35E�V354c�*MWV0XïV0X73x�W3>VV3>6��=CX0¢3BS[3!X73x�¹C��0V,Vª��86J8i�����JX78i��V0X%3GC5KB3>6JC-�B3"�B35E73>6JC��¹M��5C�V0MW8<E§8�KB3>6ÌC���� y�½ 3EÄ% j3>6JM¹;=35E�V�`Ð ½ �3>V��&Ë.¾6DZ%E���35CBOJXRÓ�&&C��¹8<E��9�*MWV0X§MWV��0V0CBE%4%C�6J4 473>KuM¹C�V0MW8<E�S¾»�35Z76JC��&E73>Vª��8B6J\ïC�6JODX%MWV35ObV0Z76J3ÌZ��354ö�È8B6�C2�B35E73>6JC��I/�Y[9U %60354%MPObV8B6�X�CB4ö�JM|Ä X%M¹4�4735EE%35Z7608<E���KB3>6��0Z���V35EÌZ��354ÏM¹E��ÒCB;�M+�)���z j35O>M|{)O*E%35Z76JC���E%3>V!��8B60\$�/Ðl4�Z73*V8��¹C�6�B3>6&ENZ%;�Hj3>6�8���V6JCBM¹E�M¹E��Ô3EÄ7CB;� ��W3��C�KeCBM+�¹C�H��W3ÔM¹EÄC��PM)�<E%;=35E�V�0¢H�C��3546�lCB;�M��)���z j35O>M|{)O[4%M��08B6J473>6!4%C�V0C��3>V�ÓDS3!X73Ô603��JZ��WV�*MPE%4%M¹O>C�V3UV0X%C�VIV0X73*�È35C�V0Z76J3*�3��W35ObV0M¹8<E@V35OJX�E%M��NZ73�35;� #�W8i�B354îM¹EÄV0X%M+���V0Z%4��� %6J8N4%Z�Ob3��!3��NZ%C����)�

�B8N8u4G8B6[Hj3>VV3>6U4%C�V0C6�3>V�G�È8B6G %60354%MPObV8B6I473>KB3��¹8� �;=35E�V�8<E2 %608BV35MPEè4%M+�8B6J473>6*4�C�V0CuS,3*X�Z���&#�Ò35C�V0Z7603��3��W35ObV0MW8<E4�C�V0C���C���Z��3546�Ò8B6*C�����V0X%3U6035;�CBM¹E%MPE��=E735Z76JC���E73>Vª��8B6J\Ì4%3>KB3��W8� �;=35E�V*CBE%4x �60354%M¹ObV0MW8<EÏ3EÄ% j3>6JM¹;=35E�V�>S

R¥�Ä3EÄ% ��¹CBMPE7354 MPE · 35ObV0MW8<E ½ &[V0X732{)E%C��, %6J354%M¹ObV8B6�����3>603ñV6JCBM¹E7354ë8<EëV0X%3ñ35EgV0MW6J3¾Ob8B6J603��z j8<E%4%M¹E��ï4%C�V0C�03>V��&�V0X78��03�V0X%C�V/��3>603�8B6JM��<M¹E%C����)�s �C�60V0MWV0MW8<E%354¾V8s�B35E73>6JC�V3 ½ 0nOb608����KeC��¹MP4%C�V0MW8<Eñ4%C�V0CuS�3!X73��3�{)E�C��sKB3>6��0MW8<E���B35E%3>6JC�V354@V0X73�603��0Z��WV�&6J3� �8B6JV354@M¹EÌV0X734�Ò8����W81�*M¹E���V!��8��035ObV0MW8<E��>S3!X73U603��0Z��WV�Ë�È8B6*V0X73ÔOb8<;�H)M¹E%C�V0MW8<EÄ8��'�lCB;�M��)��0!�z j35O>M|{)OI4%C�V0C��3>V�NÐ�¶&C�» § V8� j8<M��8<;=3>6DC��31Ó&C�603ÔOb8<E�V0CBM¹E7354

MPE"3-C�H��W3 Í S/��VUM��[M¹;� j8B60V0CBE�V�V8Ì8BH��3>6JKB3��¹8i��3>64�B35E73>6JC��¹M)�5C�V0M¹8<EñCBO>O>Z76JCBOE�2�È8B6[V0X73w¶&C�» CBE%4îV8� �8<M+�8<;=3>6JC��30!� �35O>M){)OÌ %6J354%M¹ObV8B6����*X735E¥V0X73��¥C�603UC- � ��PMW354=V8=C ¹ 0��lCB;�M�����4%C�V0C��3>V�>S(3!X%M+��603��0Z��WV���JZ� � j8B60V�V0X73[X��� j8BV0X73��0M+�V0X�C�V�¶&C�» CBE%4$V8� j8<M��08<;=3>6JC��3ÏX%C5KB3Ä4%M|Áj3>6035E�V/�)C�KB8B6��Q8��*4%M��08B6J473>6�&sC���V0X%3ÏCBO>O>Z76DCBOE� 47608� 8NO>O>Z%6��,;¥CBM¹E��)���X735E6 %60354%MPObV0M¹E���8<E@4%C�V0C�Ob8<;¥M¹E����Ò608<; V0X73Ô8BV0X%3>6Ì�ÒCB;¥M��)�BS½ 0nOb608����KeC��¹MP4%C�V0MW8<E6�&C���C����08¥O>C�606JMW354@8<Z7V��Ò8B6*C¥E%35Z76JC���E73>Vª��8B6J\ÄV6JCBM¹E7354Ä8<EGV0X73/�*X%8��W3*¶&C�» § V8� j8<M��8-0

;�3>6JC��3¥4%C�V0C��03>V�CBE%4 O>C����¹354���¶&C�» § V8� �8��èM¹E93-C�H��W3 Í SÄ7�KB35EñV0X78<Z��<XñV0X�M��,���W8BH�C��� �60354%M¹ObV8B6U603��JZ��WV�UC�603¥CH)M)�QMP;� %608LKB35;=35EgV18LKB3>6!V0X78��3U8���V0X73*¶&C�»#CBE%4ÌV8� j8<M��8<;=3>6JC��03G �60354%M¹ObV8B6���&uM¹V�Ë �3>6��È8B6J;¥CBE%Ob3IM+�Ú�JM)�<E%M|{)O>CBE�V�)�

y Ô

Page 18: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

F[Z7V�0¢8��h0!�0CB;� #�W34 %60354%MPObV0MW8<EÌCBO>O>Z76JCBOE�YIC�V0C��0Z7H��03>V ¬�=>t u#��È%��?+���-±wCEJz=X��C v7~�w

C Û y Æ Î Ô.Æ Î%y ÆH Î Û�Æ Î Ô.Æ Ô ½ ÆO Î�½ Æ Î Ô.Æ ÎXÍ Æ4 ÎXÍ Æ Î�É Æ Î .�Æ3 Û-Ö*Æ Î�É Æ Î%y Æ

R�KB3>6JC-�B3 Î�Î Æ Î Ô.Æ Î%y Æ· V0CBE%4�C�6J4Ä473>KuM¹C�V0MW8<E x4.�Æ x y Æ x/.�Æ»¥»�R�6JOJX�MWV35ObV0Z7603 y ÖX0 y ÖX0 y y ÖX0 y ÖX0 y y ÖX0 É 0 y

3-C�H��W3�.$� ½ 0nOb608���IK�C��¹M¹4%C�V0M¹8<E�&�8<Z7V�0¢8��h0!�0CB;� #�W3QCBO>O>Z%6JCBOE�`�Ò8B6,�JM¹E����W3�E%35Z76JC���E%3>V!��8B60\s %6J354%M¹ObV8B6��*8<Eî4�C�V0Cw %6J3E0 �608NOb3����354x�*MWV0XÌV0X%34�È35C�V0Z76J3��3��W35ObV0MW8<E@V35OJX%E%M+��Z73

F[Z7V�0¢8��h0!�0CB;� #�W34 %60354%MPObV0MW8<EÌCBO>O>Z76JCBOE�· M¹E����W34»¥»u %60354%MPObV8B6�� Ê��NH%6JM¹46�z�%�V35;

Y[C�V0Cw�0Z%H��3>V ¬�=>t u���È%�-?h�E�-±wCEJz=X��C�y ¬�=>t{z:>���È%�+y |�Ç Ø�=-±�?BÆ Ç6=-J�ý�?B>!C�JC É Û�Æ É Û�Æ Î%y Æ ÎXÍ ÆH É Ô.Æ É�Î Æ Î%y Æ Î%y ÆO É�É Æ Ô y Æ Ô Î Æ Î�¹ Æ4 É�½ Æ É Ô.Æ Ô É Æ Î%y Æ3 É Û�Æ É Ô.Æ Ô É Æ Î .�Æ

R�KB3>6JC-�B3 É Ô.Æ É�Î Æ Ô Î Æ Î�¹ Æ· V0CBE%4%C�6J4Ä473>KuM¹C�V0MW8<E x ¹ Æ x ¹ Æ x ¹ Æ x y Æ»G»#R�6JODX%MWV35ObV0Z7603 y ÖX0 y ÖX0 y y ÖX0 y ÖX0 y y ÖX0 y ÖX0 y y ÖX0 y ÖX0 y 35CBOJX

3-C�H��W3 Í � ½ 0nOb608����KeC��PM¹4%C�V0MW8<E�&�8<Z7V�0¢8��h0!�0CB;� ��W3ICBO>O>Z76JCBOE���Ò8B6Ë�0M¹E����W3�CBE%4:X��NH%6JM¹4�E%35Z76JC���E%3>V!��8B60\� %60354�M¹ObV8B6���8<EZ�E%MW8<EÏ8��߶&C�»�CBE%4x3�8� j8<M��08<;=3>6JC��3/�lCB;�M����e0!�z j35O>M|{�O�4%C�V0C��03>V�>S

Hj3��W81�ëV0X%C�V!CBOJX%M¹3>KB354@H$�¥V0X73UX���H%6DM¹46�z�$�0V35; Ob8<E��V6JZ%ObV354`�*MWV0XÌC ¹ 0��ÒCB;¥M��)�¥C�60H)MWV3>6!C��&3EÄ$ #�¹CBM¹E7354ÌM¹E · 35ObV0MW8<E½ S�3*X�Z���&�CBE M¹E�V3��B6JC�V0MW8<Eñ8��Ú�lCB;�M��)��0!�z j35O>M|{)O* %60354%MPObV8B6��UO>CBE9 %608u4%Z%Ob3�Hj3>VV3>6Ô603��JZ��WV�[V0X%CBE Cx�JM¹E����W3=E735Z76DC��E%3>V!��8B60\ V6DCBM¹E7354 8<E V0X73x���W8BH)C��14%C�V0C9�3>V�&&C¾603��0Z��WVQV0X%C�V��lZ760V0X73>6��0Z� � j8B60V�QV0X73@M¹4735Cî8��IV0X73Ì3EÄuM��0V35E%Ob3Ä8��4�M��8B6J473>6Ú�)C�KB8B6��>S

Ñ��~} �8��(F�������#���Î@��&Ë'������C�@$�.��&̨%OkÍ%O@1�.@QP�@�(��RIEïZ%E7603��¹C�V354$4%C�V0C�H�C��3Ï8��Ì %608BV35MPE��4�*MWV0X$\NE%8i�*Eö�W8<E��G4�M��8B6J473>6J354ñ603��<MW8<E��*�&C��,C���035;�H��¹354$H$�9�<C�V0X73>6JM¹E��3EÄ7CB;� ��¹3����È608<;Ý %608BV35M¹EF�¹M¹V3>6JC�V0Z7603BSF3!X%M+�N�03>V�Ob8<E��0M��V354ì8���V0X73x�Ò8����W81�*M¹E��2 %608BV35MPE����x�o�)��Ñf&�Ê�M��0V8<E73`Ê ½ & �6JMW8<E�&�ÊI;����úCBE%46���)�uOE�$�|0¢V09¥»�R �z�uE�V0X73>V0C��3�&��Ò8B6*C=V8BV0C���8�� É Ô ½ 8B6J473>60354GCBE%4 ÍeÉ�½ 4%M+�8B6J473>60354Ì6J3��0M¹4%Z73��5S· 3>KB3>6JC����V0C�V0M��0V0M¹O>C��u;=35C��0Z7603��-8��)V0X73� �60354%M¹ObV8B6�©Õ�' j3>6�Ò8B6J;�CBE%Ob3�8<EQV0X%M��-4%C�V0C4�3>V�C�603Ë�0X781�*E�M¹E*3-C�H��W3 ½ So��E

V0X%3��3[3EÄ$ j3>6JM¹;�35EgV��&7M¹EÌCB4%4�MWV0MW8<E:V8=V3��V0M¹E��� %603>KuMW8<Z����)��Z��354x�0MPE����W3G %60354%M¹ObV8B6���CBE�4ÏC=X��NH%6JM¹4��*MWV0X ¹ 0��ÒCB;¥M��)�

y�Î

Page 19: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

� �35O>M){)O�C�60H)MWV3>6�&jCBE78BV0X73>6ÔX���H%6DM¹4`�z�%�V35;¿�*MWV0X¹/�Y[9�C�60H)MWV3>6¥�&C��UC����8ÌZ��354�S¥�}E 3�C�H��¹3 ½ &#È#JC H ?���>@?BA-CwA-=-Æ I�C�4�M��8B6J473>6��QCBE�4Ã�}8B6J473>6��¥C�603�CBO>O>Z76JCBOE�Ä;=35C��JZ7603��!Ob8<;� )Z7V354@C��

� ~� � CBE%4 � �� �

��X73>603 � ~ CBE%4 � � C�603�V0X73�ENZ%;,H�3>6�8��uOb8B6J6035ObV-4�M��8B6J473>6ßÐÒV6DZ73ß j8��0MWV0M¹KB3���Ó�CBE%4�Ob8B6J6035ObV�8B6J4%3>6ÚÐÒV6JZ73�E73��<C�V0MWKB3���Ó �60354%M¹ObV0MW8<E���&BCBE%4�� � CBE%4�� � 603� %603��35E�VsV0X731V8BV0C��%ENZ%;,H�3>6s8���4%M��8B6J4%3>6sCBE�4,8B6D473>6� %60354%MPObV0MW8<E���&�603��z j35ObV0MWKB3����BSRu %60354�M¹ObV8B6�©Õ�,��CE;���?B>@?BAi?@>@ÇUCBE%4 ��È�C��? ����?B>@Ç�C�6J3

� ~� � CBE%4 � �� �

��X73>603 � � CBE%4 � � 603� %603��35E�V�V0X73GV8BV0C��*ENZ%;�Hj3>6�8��U4%M+�8B6J473>60354§CBE�4ì8B6J473>6J354§603��0M¹4�Z73��=M¹E§V0X73è4%C�V0Cf�3>V�&6J3��z j35ObV0MWKB3��)�BS(�sM¹E%C�������&NV0X%3����-J�JCEÆ)=�>@?@��;[���iCD�²��?�CE;�>�M��!473E{)E%354ÄC��

Ð � ~�� � �9Ó�� Ð~� ~�� �/�9Ó� Ð � � § �/�9ÓEÐ � � § � ~ ÓEÐ � ~ § �/�9ÓEÐ � ~ § � ~ Ó

��X73>603�� ~ CBE�4��/� C�603ÔV0X73�ENZ%;,Hj3>618��7�lC����34 j8��0MWV0M¹KB3ÔCBE%46�ÒC��+�3ÔE73��<C�V0MWKB3* %60354%M¹ObV0M¹8<E��>S

�����D�������P���������~�9�������~��������B�����>� �¡����� ¢B�D������� �B�����(��������£¤��£���¥�¦�� §<£¤�¡�9��¥�¥ ¨©���D��ª

����¥��D� �M��¥ �D� «<� �D���9�(��� § �9�>��� ¬������D�­����£�����® ¬>¯�������°����­�±® ������¦(�9����® ������²Bª¯����D�­��� £³� ����´³������£¤�

¨µ��¶ ·³¸ ¹�º¤¸ ·�»³¸ ·³¼�¸ ¼�»³¸ º�º¤¸ ·³¼�¸ ½>ª ¾�¼����¯�� ¹¿�¸ »�¹¸ »³À³¸ Á¤¿�¸ ¹�À³¸ º�¹¸ ¼³·�¸ ½>ª ½³½Â+«Äà ¿�¹�¸ ¹�¹¸ ¼�Á³¸ ·�º³¸ ·�½³¸ Á�Á¤¸ Á¤·�¸ ½>ª »¤¼¨µ��¶ÆÅÇ���³¯��@Å¿�ÈO�M���@��¥­®Q����É(�����¡� ¹³¹�¸ ¹�À¤¸ Á�¾¤¸ ·³¿�¸ ¼�½³¸ º�»¤¸ ·�½³¸ ½>ª »�¾¨µ��¶ÆÅÇ���³¯��@ÅÂ+«ÄÃÇ����É��­����� À¤¸ ¹�º¤¸ Á³À³¸ ·�¾¤¸ ¼�»³¸ º³¼³¸ ·�»³¸ ½>ª ¾(¹3�C�H��¹3 ½ ��2-3>6�Ò8B6J;�CBE%Ob3Ô8<EGCBE@Z%E7603��PC�V354x�3>V!8��o %608BV35M¹E��Ë�*MWV0Xx�W8<E���4�M��8B6J473>6J354Ì603��<MW8<E��

R¥�U3EÄ% ��¹CBMPE7354¾M¹E · 35ObV0MW8<E ½ &�Hj8BV0X �ÒCB;�M+�)�e0!� �35O>M){)O/ %6J354%M¹ObV8B6��,��3>603¥C- � #�¹MW354îV8ÄV0X73w�¹C�6��B3� %608BV35M¹Eñ4%C�V0CH)CBE7\$�5So3*X733/�Y[9¯ %60354�M¹ObV8B6(�&C����3��¹35ObV354ÏC���V0X73Ì�B35E%3>6JC��� �60354%M¹ObV8B6�V8�Hj3*Z��354¥8<E¥V0X%8��3�4%C�V0C�H)C��3���;¥CBM¹E��)�Hj35O>CBZ��03¥MWVÔX%C��UV0X%3w�0;�C����¹3��V4�ÒC��+�3�E73��<C�V0MWKB3:3>60608B6�CBE%4 V0X73¥X%M)�<X%3��V/�35E��0M¹V0MWKNM¹V!�G8��1C����o �60354%M¹ObV8B6��5Sw3!X%M��UM+�MP;� j8B60V0CBEgV*H�35O>CBZ��3/��3,O>CBEîZ��3� �60354%M¹ObV0MW8<E��&8���4%M��8B6J4%3>6!8<Es»�6�� .�4èC���CBEG3��V0MP;�C�V3�8����lC����3/ j8��0M¹V0MWKB3Ô3>60608B68<Es�¹C�6�B3�4%C�V0C�H)C��3���&%H�Z%V1V0X73>603ÔM��!E%8�Ob8<;� �C�6JC�H����ÏCBO>O>Z76DC�V3��&C��Ì8���3��0V0M¹;�C�V0M¹E����lC����3ÔE%3��<C�V0MWKB3�3>606J8B6��>S

Ñ���Ê %M��(��)�*��+�N,����� ��J�������� (?���ÌËM�"C ��%Ò@Q� ÔE�jN�V(\(F,������»%O@1�.@QP�@��ÎÍ�(3-C�H��W3 É �0X%8i����V0X73[O>Z%;,Z��¹C�V0MWKB3*6J3��0Z��WV��8���C- � ��)�uM¹E��UV0X73G�3��W35ObV354� %60354�M¹ObV8B6���8<E�»�6�� .�Y#CBE%4 · �*M����2�608BV35M¹E�S�%8B6Ô35CBOJX[�W35E��BV0X9�&�V0X73=V0C�H��W3��0X%8i���[V0X73��Ò6JCBObV0MW8<E 8���V0X73=V8BV0C���E�Z%;,Hj3>6U8���6J3��0M¹4%Z73��[M¹EîV0X73�4�C�V0C�H�C��3�V0X%C�VHj3��W8<E���V84 %6J354%M¹ObV354�4%M��8B6D473>60354,603��<MW8<E��s8��R�W35E��BV0X���8B6(�W8<E��B3>65S'3*X%M��-M����0X781�*E�C��W8<E��4�*MWV0X,V0X731V8BV0C����Ò6JCBObV0MW8<E8��-603��0MP4%Z73��&V0X%C�VÌ��3>603/ �60354%M¹ObV354ÄC���4%M��8B6J4%3>60354�&N603��<C�6J4��W3����18��sV0X73/�0M)�>3U8��sV0X73�4�M��8B6J473>6J354:6J3��<MW8<E�S

y Û

Page 20: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0

1

2

3

4

5

Fra

ctio

n (

%)

0 20 40 60 80 100 120 140 160 180 PDR size

SW

NRL_3D

�sM)�<Z7603�Û$�Ú¶1C�»u�lCB;�M����e0!�z j35O>M|{�OÌ %60354�M¹ObV0MW8<E��&8<E`�PC�6�B3/ %608BV35MPEÄ4%C�V0C=H�CBE7\%�>S

0

1

2

3

4

5

Fra

ctio

n (

%)

0 20 40 60 80 100 120 140 160 180 PDR size

SW

Nrl_3D

�sM)�<Z7603 y Ö%��3�8� j8<M��8<;�3>6JC��3/�lCB;�M��)��0!�z j35O>M|{)O¥ %60354�M¹ObV0MW8<E���8<E`�¹C�6��B3/ %608BV35M¹EÄ4�C�V0C=H�CBE7\%�>S�-M��<Z7603��,Û$& y ÖÏCBE%4 y�y �JX78i��X%M��0V8��B6JCB;���8��(�È6DCBObV0MW8<EG8���V0X73�V8BV0C���ENZ%;,H�3>6�8���603��0MP4%Z73��*MPE@V0X73�4%C�V0C�H�C��3

V0X�C�V�Hj3��W8<E��ñV8 4�M��8B6J473>6J354 603��<MW8<E��sÐl2�Y[9GÓ�8��4�W35E��BV0XF�0S 3*X73��3GX%M+�V8��B6JCB;���CBE�4²3-C�H��W3 É �0Z����B3��V¥V0X%C�V�¹8<E��G4%M��08B6J473>60354¾603��<M¹8<E���C�603ÏOb8<;�;=8<EïM¹E E%C�V0Z%603BS6��E%4%3>354�&�Z��JM¹E��ÄV0X73��B35E73>6JC��( �60354%M¹ObV8B6�©Õ��ÐÈ/�Y[9GÓU603��0Z��¹V�8<E"3�C�H#�W3�� ½ CBE%4 É &)V0X73��Ò6JCBObV0MW8<EG8��s4�M��8B6J473>6J354Ä603��0M¹4�Z73��&Hj3��W8<E��<M¹E��=V8:603��<MW8<E��*8��(�W35E��BV0X Í Ö:8B6��B6J35C�V3>6I8<E· �*M���U2�608BV35M¹E M��Ô3��V0M¹;�C�V354$V8GC�Hj8<Z7V y�y ÆÏS6Ê*3>603�&-V0X73 · �*M���02�608BV,�ÒC��+�3� j8��0MWV0MWKB3=3>606J8B6Ô6JC�V3:M+�[3��V0M¹;�C�V354

2�60354%M¹ObV8B6 3�8BV0C�� �ÎÏ ¹ Ö �ÐÏ Í Ö �ÐÏ É Ö»�6�� .�Y · 8 »*6�� .�Y · 8 »�6�� .�Y · 8 »*6�� .�Y · 8

¶1C�» Û�Æ y�½ Æ Í Æ Û�Æ ÖuS Î Æ Í Æ ÖuS ¹ Æ ¹ ÆV8� j8<M��08<;=3>6JC��3 y�¹ Æ y�½ Æ ½ Æ Ô.Æ ÖuS Û�Æ ¹ Æ ÖuS ¹ Æ ÖuS Ô.Æ/�Y[9 ¹�Î Æ . Í Æ y�Î Æ ¹�É Æ Ô.Æ y�½ Æ .�Æ Û�Æ

3-C�H��W3 É �o�76JCBObV0MW8<E�8��R»*6�� .�Y CBE%4 · �*M���-2�6J8BV35M¹ExÐ · 8�Ó�603��JM¹4%Z73���Hj3��W8<E��<M¹E���V8, %60354%M¹ObV354Q4%M��08B6J473>60354,603��<MW8<E��8��o�W35E��BV0X`��8B6��W8<E��B3>6

¹ Ö

Page 21: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

0

2

4

6

8

Fra

ctio

n (

%)

0 40 80 120 160 PDR size

SW

Nrl_3D

�sM)�<Z7603 y�y �L/�Y[9l�B35E73>6DC��n %60354�M¹ObV0MW8<E���8<Es�PC�6�B34 %608BV35M¹EÄ4�C�V0C=H�CBE7\%�>S�Ò608<;ï»*6�� .�YN&��*X�M��W31MWV�M���C���0Z%;=354¥V0X%C�V�V0X73IE73��<C�V0MWKB3�3>60608B6�3��0V0M¹;�C�V3*8BH�V0CBM¹E7354¥MPE�3�C�H#�W3 ½ M���603� %603��035EgV0C�V0MWKB38���V0X%8��3�8<E:V0X73G�¹C�6�B3�4�C�V0C�H�C��3���&7C���MWV�M���V0X73�O>C��03¥�*M¹V0X�V0X73¥�ÒC����03� j8��0MWV0MWKB3*3>60608B6����0X78i��E:M¹E�3�C�H#�W3�� ½ CBE%4 É S8ñ3=O>CBE9�3>3=M¹E23-C�H��W3 É V0X%C�V[V0X73�3��V0MP;�C�V3542�ÒC����03* j8��0MWV0M¹KB3,3>606J8B6I6DC�V3N�Ò8B6[V0X73u/�Y[9^ %60354�M¹ObV8B6I4%608� ��¥�È608<;¹�ΠƼ�Ò8B6,C����(�JM)�>3��Ô8��!4%M+�8B6J473>60354¾6J3��<MW8<E��ÔV89Ô.Ƨ�Ò8B6,4�M��8B6J473>6J354ñ603��<MW8<E��Ô8��Ì�0M)�>3 Í ÖG8B6N�W8<E��B3>6�D��8s�Ò8B6*�W8<E��4�M��8B6J473>6���V0X73G�ÒC����03� j8��0MWV0MWKB3�3>60608B6�6JC�V3[47608� ���V8QC*�Ò8<Z760V0X:8���V0X73�V8BV0C���K�C��¹Z73BS�RG��0Z%;¥M¹E��ÔCN�0M¹;�M��PC�6�47608� ��È8B6V0X%3G�lC����3[E73��<C�V0MWKB3U3>6J608B6&6JC�V3�&���3,�B3>V y�y>Ñ1Í � ¹ { Ô ½ Æç�lC����3[E73��<C�V0MWKB3U3>60608B6Ë�Ò8B6Ì�W8<E���4%M��8B6D473>60354:603��<MW8<E��>S · 8�&�Ò6JCBObV0MW8<E@8��s4�M��8B6J473>6J354:6J3��0M¹4%Z73��1MPE · �*M���J2�608BVÚ�È8B6�603��<MW8<E`�¹35E��BV0X���Ï Í Ö�M+�13��V0M¹;�C�V354GC����

¬�ÒÓ � �Ò6JCBObV0MW8<Ex �60354%M¹ObV354u�¾�lC����34 j8��0M¹V0MWKB3U3>60608B6 § �ÒC����03ÔE73��<C�V0MWKB3Ô3>606J8B6��X%M¹OJXÄMPEÌV0X%M��1O>C��3*��8<Z��P4ÌH�3��

¬�ÒÓPÔ y�½ Æ��cÔ.Æ § .�Æ � y�y ÆÕ �¯�Iý��(ë���è���ý�èÂÿ!ý��éå �èR�(��è#è��Iý· 3>KB3>6JC���Ob8<E%O��¹Z��0MW8<E��1O>CBEGH�3U476DC��*Ex�Ò608<; V0X%3U8BH%V0CBM¹E7354Ä3EÄ% j3>6JM¹;=35E�V0C��j603��0Z��WV���

0 Y[M��8B6J473>67�3>35;���V8�Ob8<;=3�M¹E4�03>KB3>6JC��g4%M+�V0M¹E%ObV0MWKB3o��C5KB8B6���&X�*X%MPOJXÔ;�C�\B3���MWV�4%M)´:O>Z��WVR�È8B6-C:�B35E73>6JC��g4%M��8B6J4%3>6 %60354%MPObV8B6�V8ÄCBOJX�MW3>KB3=X%M)�<X73>6G %60354%MPObV0MW8<EGCBO>O>Z76DCBOE�BS m6jhaiPndËS�V%]5V$O1Z#jB\ ° Z�T1\BP#]�PR]�Z�]lQ']5OXV%jhZ�TiV�pWa�VeTP�_ b'O1P�TiV$\@]7a¯Y[Z�÷#V�a²T1M5V Z�kekeQ5OXZ�k�r¿p'O1P#b§_!P�O�Z#jBj6b'OXV�po\Bk�TiP�OXa<p7V�ñ#V%jBP�b(V$p¼\@]qT1M7\Ba¯a�T1Q7p5r�daiQ7S�S�V$a�T1\@]7S²TXM5Vöb(P�aiai\Bð'\@j@\hT�rWP#_*Y[P�OXVfpo\Ba�P�OXp7V$O×Ö'Z�ñ#P#O1a2]5P�TsOXV�b'O1V$a�V%]RTiV$pÂ\@]uP#Q7O"T1O1Z�\@]'\@]5Sa�V�Tia�ø Y[M|Áj3>6035EgV1Vª�� j3��*8��-4%M+�8B6J473>6Ì�3>35; V8�Hj3[603��¹C�V354@V8:4%M|Áj3>6035EgV: �608BV35M¹E6�lZ%E%ObV0MW8<E��5S

0 8 X%35E" �60354%M¹ObV0M¹E���V0X735MW6I8i�*Eî\uM¹E%4G8���4%M��08B6J473>6�&#�ÒCB;�M+�)�x�z j35O>M|{)O/ �60354%M¹ObV8B6��I478ÌCBOJX%M¹3>KB3QHj3>VV3>6[8<Z7VI8���0CB;� ��¹3¥CBO>O>Z76JCBOE�$C��,Ob8<;� �C�60354 V8èCs�B35E73>6JC��� %60354%MPObV8B6�&�H�Z%V�X%C5KB3ÌM¹E��JZ%´:O>MW35E�V/�35E��0M¹V0MWKNM¹V!�îV8G8BV0X73>64%M��8B6D473>6ÌV!�$ �3���&¥�*X�M¹OJX<�0Z����B3��0V@V0X%C�V@4%M|Áj3>6035E%Ob3��ÌHj3>Vª��3>35E��lCB;�M����e0!�z j35O>M|{�OG4%M��08B6J473>6ÌV!�$ j3��ÄO>CBE�Hj3473>3� �S/¶�8<;,H�M¹E%C�V0MW8<E��!8��(�lCB;�M��)��0!�z j35O>M|{)O, �60354%M¹ObV8B6��¥�W8N8B\` %608<;�M+�0M¹E���C��G�B35E73>6JC��s4%M+�8B6J473>6Ì �60354%M¹ObV8B6���& %608LKNM¹4�M¹E��QV0X%C�V*CBEGC- � %608� %6JMPC�V3[MPEgV3��B6JC�V0M¹8<E@;=3>V0X78u4@M��!4%3>KNM��0354�S

0 /�8<E�� 4�M��8B6J473>6J354$603��<M¹8<E����3>35; V8ñ603� %6J3��35EgV=C9�0;¥C�����H�Z7V��0M)�<E%M|{�O>CBEgVN j8B60V0MW8<Eï8���E%C�V0Z%603.©Õ�� %608BV35MPE�3��NZ735E%Ob3��>S`�}E%473>354n&�V0X73��ÒC��+�3w j8��0MWV0M¹KB3� %60354%MPObV0MW8<Eñ3>60608B6N�<C- ïH�3>Vª��3>35Ec»�6�� .�Y�CBE%4 · �*M���J2�608BVÔCBE%4

¹%y

Page 22: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

Cw�lC����3QE73��<C�V0MWKB3Q3>60608B6I3��V0M¹;�C�V3N�Ò8B6�V0X73�/�Y[9 %60354�M¹ObV8B6¥�0Z����B3��V�V0X�C�VIC�Hj8<Z7V y�y Æ�8���C��+��603��0MP4%Z73��*MPE· �*M����02�608BV�Hj3��W8<E��ÏV8@4%M��8B6J4%3>60354G6J3��<MW8<E��I8�� Í ÖÌ8B6U;=8B603�603��JM¹4%Z73��[M¹E2�W35E��BV0X�S*3!X%M���603� %603��035EgV�[;=8B603V0X%CBEÄVª��8Ï;�M����¹M¹8<E¥603��JM¹4%Z73���&%�*X�M¹OJXÄM��&3��NZ%MWK�C��W35E�V1V8¥C�Hj8<Z7VGÔ�&ÕÖ�Ö�Ö:C5KB3>6JC-�B3E0!�0M��>3* %6J8BV35M¹E��>S

Å&MW8��¹8��<M¹O>C���M¹;� #�¹M¹O>C�V0MW8<E���8��sV0X73��34{�E%4%M¹E����&C�603Ô4�M��0O>Z���0354ÄM¹EÌV0X73Ô603��0V18��-V0X�M��:�35ObV0MW8<E�S

}H��� ,������.���V�ÎA � ��J��������Î@�� -��Ø��#����!B!���������(\(6@���&A:C�@ÚÙ��)�*(»�)�­%'�V(F���* �+�· 3>KB3>6JC��o %608BV35M¹E2�lZ%E%ObV0MW8<E��IX�C5KB3=Hj3>35EñM¹4735E�V0M|{�354èV0X%C�VU603��NZ%MW603�4%M��08B6J473>60354" %608BV35M¹En&jMPE%O��¹Z%4%MPE��¥C�V/�W35C��V[V0X73�Ò8����W81�*M¹E���V0X7603>3�� y S�603��<Z��¹C�V0M¹8<E¥8���35E����u;�C�V0M¹OICBObV0MWKuMWV!�:CBE%4#ÙL8B6Ë�¹M)�Ò3>V0M¹;=3���H$�� %608BV3>8����$�0M+�G¸Ï.�. º D ¹ S�;=35ODX%CBE%M¹O>C��Z�E%Ob8<Z� ��¹MPE��`¸ y . º D�CBE%42.NS�;=8��W35O>Z��¹C�6�6035Ob8��<E%MWV0M¹8<EGKuM¹C¥4�M��8B6J473>60¢V8-0¢8B6J473>6*V6DCBE��0MWV0MW8<E��!Z� j8<E@H�MPE%4%M¹E��`¸ ¹ & ½ &Ô�&Î & y�y & yEÍ & y Ô%& y�Î & y Û%& ¹�¹ & ¹XÍ & ¹�½ & ¹ Ô$& ¹�Î &'.-Ö�&�. ¹ & Í Ö�& Í�y & Í . º S 3!X73w��M¹473E0!�z %6J35CB4ñ8NO>O>Z%606035E%Ob3Ï8��Ì %608BV35MPE4�M��8B6J473>6UM¹E�4%M¹O>C�V354¾H$�èV0X73�4�C�V0Cx %603��35E�V354 X73>6J35M¹EñCBE%4¾3����3���X73>603s¸Ï. ½ &5. É &'.�Ô º �0Z� � j8B60VIV0X73¥Ob8<;¥;=8<E%E73���CBE�4@M¹;� j8B60V0CBE%Ob3[8���4%M��08B6J473>60354� %608BV35MPEx�È8B6*V0X73��3ÔCBE%4x j8���JMWH��)��8BV0X%3>6Ì %608BV35M¹E`�ÒZ%E�ObV0MW8<E��>S

F[Z76U4%C�V0Cx�0Z����B3��0VÔV0X%C�VÔ4%M��08B6J473>60354è603��<MW8<E��UMPEñ4%M|Áj3>6035EgV, %6J8BV35M¹E��[O>CBE X%C�KB3��0M)�<E%M|{�O>CBEgV�)�è4%M|Áj3>6035EgV4�3E0�NZ735E%Ob3ñODX%C�6JCBObV3>6JM��0V0M¹O��>Só3!XNZ���&�V0X73>603¾C�603ñ3>KuM¹4735E�V�)�c�)C5KB8B6��Ä8��� %6J8BV35M¹Eë4%M��8B6J4%3>65S 8ñ3ñ6JC�V0MW8<E%C��¹M��>3èV0X%M+�8BH#�3>60K�C�V0MW8<E:MPE=V3>6J;���8���V0X73�4�M|Á�3>6J35EgV��ÒZ%E�ObV0MW8<E���8���4%M+�8B6J473>60354�603��<MW8<E���M¹E�4%M)Á�3>6035E�Vß �608BV35M¹E��>S(¶�8<E��JM¹473>6�V0X73 )CBMW6�8��� %608BV35M¹E��-M¹E,V0X%M��'�V0Z%4��BSsRÃ�0M��<E%M|{)O>CBE�V5 j8B60V0MW8<E,8��%V0X7314%M+�8B6J473>60354�603��<MW8<EQM¹EQO>C��¹O>M¹E735Z76DM¹E/�Ò8B6J;��-C[X73��¹M|ÄjS3*X73� %6J8BV35M¹E¥V0X�C�V�H)M¹E%4���V8=O>C��¹O>MPE735Z76JM¹E��!6JC- ���C�608<Z%E%4:V0X%M���X73��¹M|Ä¥Z� �8<E:Ob8<;� ��W3EÄ��Ò8B6J;�C�V0M¹8<E�S�Rl�0Z7H#�V0CBEgV0MPC�� j8B60V0M¹8<EÄ8���V0X73Q4%M��8B6J4%3>60354Ä603��<MW8<EîM¹EÄV8� j8<M��08<;=3>6JC��3QH�M¹E%4��&V8ÏY,»IR�D�3>KNMP4735EgV����&�V0X73,V8� �8<M+�8<;=3>6JC��3N�!6JC- #�C�6J8<Z%E%4ïV0X73@Y,»�R,S(�78B6J;¥C�V0MW8<E§8��*V0X%3@Ob8<;� ��W3EÄ M¹Eï35CBOJX O>C��03Ä603���Z�MW603��QV0X73Ì603��z j35ObV0MWKB3@4%M+�8B6J473>60354ïCB;�M¹E%8CBO>MP4��QV8¾CB4%8� %VQC �z j35O>M|{�Ow�V6JZ�ObV0Z7603��*X735E M¹E V0X73Ì8B6J473>60354ö�V0C�V3BS[3*X73��V6DZ%ObV0Z76JC���603��NZ%MW6035;�35EgV�*�È8B6�V0X73Ob8<;� ��W3EÄu354�&78B6J473>60354x�0V0C�V3��*C��¹;=8��0V!Ob3>60V0CBM¹E��)�ÏX%C5KB3,Ob8<E��3��NZ735E%Ob3��:�Ò8B6!V0X73U3>KB8��¹Z%V0MW8<E%C�6�6�3��W35ObV0MW8<EÌ8��sCB;�M¹E%8CBO>MP4���M¹E$V0X%3:603�� �35ObV0M¹KB3Ï4%M+�8B6J473>60354 603��<MW8<E��>S9�78B6=V0X73��3Ì6035C��8<E��QCBE�4[�<M¹KB35E V0X%3��¹C�6��B3Ì4�M|Á�3>6J35E%Ob3��,MPE$V0X73Ob8<;� ��W3EÄu3��:�È8B6D;=354x�*MWV0XÌV0X%35MW6!603��z j35ObV0MWKB34 )C�60V0E73>6���&���3/��8<Z��¹4Ì3EÄ% j35ObV!V0X73��3��NZ735E%Ob3,OJX%C�6JCBObV3>6DM��V0M¹O��*8���V0X734�M��8B6J473>6J354@603��<MW8<Eè8���O>C��PO>M¹E735Z76JMPEÄV8ÌH�3,KB3>6�G4%M)Á�3>6035E�VG�È608<; V0X73�OJX%C�6DCBObV3>6JM��V0M¹O��[8���V0X73Q4�M��8B6J473>6J354@603��<MW8<E8��-V8� j8<M��8<;=3>6DC��3BS�F[Z76Ì{)E%4%M¹E�����C�603,Ob3>60V0CBM¹E��)�ÌOb8<E%Ob8B6J4�CBEgVÌ��MWV0Xx�0Z%ODX@C�4%M|Áj3>6035E%Ob3BS

R¥�WV0X%8<Z��<Xè4�M|Á�3>6J35EgV��03���Z735E�Ob3QODX%C�6JCBObV3>6JM��0V0M¹O��G�È8B6U4%M|Áj3>6035E�V*4%M��08B6J473>60354G603��<MW8<E��IE%C�V0Z76JC��+�)�6�È8����¹8i�����È608<;4�M|Á�3>6J35E%Ob3��=M¹E V0X735MW6��lZ%E%ObV0M¹8<E���&�V0X73@O>Z%606035E�V�CBE%4c %603>KuMW8<Z��Q603��0Z��WV�`¸Ï. ½ &ß. É &ß.�Ô º C��+�8¾�0Z����B3��V¥V0X%C�V¥4%M��08B6z04%3>60354G6J3��<MW8<E��¥�*MWV0Xî4%MWKB3>6��3*�ÒZ�E%ObV0MW8<E���C����8ÌX%C5KB3��8<;=3N�Ò35C�V0Z7603��[M¹EGOb8<;¥;=8<E�S[Y�3>KB3��¹8� �M¹E��ÌCBE¾C- � %608� %6DM¹C�V3O��PC���0M|{)O>C�V0M¹8<EÌ8��-V0X%3,�)C5KB8B6��*8���4%M��8B6J4%3>6Ú��M�����Hj3ÔC�OJX%C��+�W35E��<M¹E��� %6J8BH��W35; M¹E%4%3>354�S

}H�>= ��� ��J[��&A:���xÂÄ�+�*(\� (6F� ���J[�$&A���C� �����3*X73>603�M��� j8BV35EgV0M¹C��-Ob8<E��lZ��0MW8<E@H�3>Vª��3>35E¾M¹E�4%Z%Ob354x�Ò8��¹4%M¹E��s¸ Í�yEº CBE%4GV0X73���3����|0¢6J35Ob8��<E%M)�>354îM¹E%4%Z%Ob354x{�V*¸ ¹%y�º R¥�Ob8<;¥;=8<E��)�ñZ%E%4%3>6��V8N8N4�&�M¹E%4%Z%Ob3542{)VÔ603��Ò3>6��ÔV8GCs %608BV35M¹E V0X%C�V,M��Ô3���35E�V0M¹C����)�2�È8��P47354�&�H)Z7V/�Ò8B6/�*X%M¹ODXñV0X73>603M+���0Z7H#�V0CBEgV0MPC��Gý=e�¤Û�ý��-;RC,8B6��0M¹4%3¥OJX%CBMPE ;=8LKB35;=35E�V�Z� �8<E Ob8<;� ��W3Eľ�Ò8B6J;�C�V0M¹8<E�S LNM5Z�T9\Ba�d4Z�jhT1M7P#Q7S#M T1M7Vb'OXP�TiV%\@]^M5Z�a"Z²a�bßV�ke\htokFô�õ a�TiOXQ7k�T1Q7OXV�d4\hT"k�Z�]^Q']7p7V$O1S#P<a�P#Y[VckXM7Z�]7S�V$a2\@]^\hTiasaib7Z�TX\hZ#j4k�P#]7_!P#O�ÀY[Z�T1\BPR](ø�L*M'\Ba�îNZ�r�dß\hT�keZ�]¯ð(VeTiTiV�O�YfZ�TikXM²T1M7V aiM5Z�b(V"P#_�TXM5V YfPRjBV�keQ'jBV9\+T�ð'\@]7p7awTiPö\@]¯P�OXp'V�O�TiPS#V$]7V$O1Z�T1VsZ¾k�PRYfbojBVem�ø F,�ÈV35EÄV0X%3UH�CBO0\NHj8<E73�;=8LKB35;=35EgVIM��!CBO>Ob8<;� #�¹M��0X7354ÌH$�ÏV0X73��0X%M��ÈV�&8��-V!��8¥603��PC�V0MWKB3��)�6DM)�<M¹4�478<;¥CBM¹E���KuM¹C�V0X73I4%3��È8B6J;¥C�V0MW8<E�8���C,Ob8<E%E735ObV0M¹E��QX%MPE��B3E0!�¹MW\B3!6J3��<MW8<E�S�3!X73IZ��0Z%C��)CBE%C��W8������Ò8B6�M¹E�4%Z%Ob354�{)VM+�1C����W8�KB3QOJX%CBE��<M¹E����0X%C- j3UV8�{)V1V0X73�X%CBE%4�S��E%4�Z%Ob354s�Ò8��¹4%MPE���&��*X�M¹OJXîM¹E�KB8��WKB3��[CÏ4�M��8B6J473>60¢V8-0¢8B6J473>6IV6JCBE��0MWV0M¹8<EèZ� j8<EèOb8<;� ��W3EÄs�Ò8B6J;�C�V0M¹8<E�&�M���O��¹35C�6��)�

4�M��V0M¹E%ObVw�È608<; V0X73îKB3>6��0MW8<E 8���M¹E�4%Z%Ob354c{�VÌ473��0Ob6DMWHj354ìC�Hj8�KB3BSÌÜ V$O1VlT1M5Vub7OXP�T1V$\@]g\BaFpo\Ba�P�OXp7V$O<\B] T1MQ']ð(PRQ7]7p^a�TiZ�T1V�d�Z#]5p^Z�keúnQ7\BOXV�a2Z²a�bßV�ke\htokFô�õ keP#]7_!P�O-Y[Z�T1\BP#] Q7b(P#] _ªP�O-Y[\@]7S Z k�P#Y[b'jBV�m�ø 3!X%3 �608BH��W35;.M��-V0X%C�V�V0X73&V3>6J;§�M¹E�4%Z%Ob354�{�V�[X%C��sHj3>35EN�0V603>V0OJX7354�V8[Ob8LKB3>6�KuMW60V0Z%C��+�)�ÔCBEe�,V!�$ j3�8���Ob8<E��Ò8B6J;�C�V0MW8<E%C��

¹�¹

Page 23: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

ODX%CBE��B3QV0X%C�V*8uO>O>Z76��IZ� j8<E@Ob8<;� #�W3EÄ`�È8B6D;�C�V0MW8<E�SË�«��V0X73*�V6J3>V0OJX7354èKB3>6��0MW8<Eè8���M¹E%4�Z%Ob3546{�V*M+�*CBO>Ob3� %V354�&jV0X735EMPE%4%Z%Ob354��Ò8��¹4%M¹E���6035CBObV0M¹8<E��!C�603�Cw�0Z7H��3>V18��sM¹E%4�Z%Ob354�{�V16035CBObV0MW8<E��>S

}H�>� ,��*�����NA���CV��V� �ØÂ��+�*(\��(6��� ��J[�� A ��C� ��� �3*X73:M¹;� �8B6JV0CBEgVN�È35C�V0Z%603��Q8��*CBEe�f�<MWKB35E ;=8��W35O>Z��¹C�6Q6035Ob8��<E%M¹V0MW8<Eï3>KB35EgV�C�603ÌMWV�,V0X73>6J;=8u4��uE%CB;�M¹O��6ÐÒ3BSÏ�7S)&�V0X73=��F;�?B>@Ç Z#]5p ��È�C���? ����?@>@Ç v CBE�4@MWV�1\uM¹E73>V0M¹O��*ÐÒ3BSÏ�7S�V0X73��-;+Ç Z�]5p ��Ý�Ç«Jz=�>!C�� v SEÞG�0M¹E��=V0X73�M¹4735C��!8B6JM)�<M¹E%C��+�)�¥473>KB3��|08� j354ñH$� · OJXNZ��)�2¸ Í Ö º &7��3¥3EÄ% ��W8B6J354ñV0X73w�¹M¹\B3��)�î4�M|Á�3>6J35E%Ob3��U8�KB3>6�3>KB8��¹Z%V0MW8<E%C�6�îV0M¹;=3�Hj3>Vª��3>35E[ %6JMW8B64�Ò8��¹4%MPE��ÐÒ8B6D473>60354x %6J8BV35M¹E���Ó�CBE%4ÄMPE%4%Z%Ob3546�Ò8��¹4%M¹E��*�*M¹V0XÌ603��<C�6J4@V8:;=8��W35O>Z��¹C�616J35Ob8��<E%MWV0MW8<Ef¸ÏÛ º S8 MWV0Xè603��<C�6J4èV8ÏH�M¹E%4%MPE���V0X73>6J;=8u4��uE%CB;�M¹O���&�8<Z76*3EÄ% ��W8B6JC�V0M¹8<E����0Z����B3��V�V0X�C�V�&R�Ò8B6� �6JMW8B6��Ò8��¹4%MPE���&�CX´:E%M¹V!�

CBE�42� �35O>M){)O>MWV!�èC�603��¹MW\B3��)�@V8ÄHj3��V608<E������s�¹M¹E7\B354î8LKB3>6ÔV0M¹;=3BS�3*X%C�VUM���&�CBO>Ob8B6J4%M¹E��ÏV8Ä8<Z%6ÔCBE%C��)�%�0M���8��ß %6JM¹8B6�Ò8��¹4%MPE���&<;,Z%V0C�V0MW8<E���C�6J3��¹MW\B3��)�,V8�M¹E%Ob6J35C��3!Hj8BV0X=V0X73*CX´ÏE%MWV!��CBE%4�� �35O>M){)O>MWV!�Q8B6�4735Ob6J35C��3*Hj8BV0X�So3!X%M����PM¹E7\�C-�B38��:�z j35O>M|{�O>MWV!�ñCBE%4 CX´ÏE%MWV!� �Ò8B6� %6DMW8B6/�Ò8��¹4%M¹E��ÄM��,E78BV/�B35E73>6DC����)�ñC- � %6035O>MPC�V354�S ùET YfZ�÷�V$asa�V%]5aiV�dGT1M7P#Q7S#MßdTXM5Z�T _!P#OfZ<b'O1P�TiV$\@] T1P�ð(VÃV�m�TiO1V%Y[V$jhruaib(V�k�\+tok�d*\hTia9ô�õ k�PR]5_ªP�O-YfZ�T1\BP#]ía1M5PRQ7jBpïY[Z�Tik-MÂT1M7Z�T P�_\hTiawð'\@]7p'\@]7Söb'Z�T�T1V�O-]²\@]¯VemnkeV�b7T1\BP#]7Z�jËp'VeTiZ#\Bjªø�L*M'\Bawb'O1V$kej@Q5p'V$awðo\B]7po\B]7S[TiP[Z#]RrÃP�T1M7V�OxY[P#jBV$keQ7jBV#dQ']'jhV$a�aG\+T,\Ba�Z�j@Y[P�a�T¥\Bp'V$]RTX\hkeZ�jªd#a�TiO-Q7k�T1Q7O1Z�j@jhrsa�bßV�Z�÷n\@]7SndRTiP�T1M5VNb'O1V$_!V$O1OXV$p2ðo\@]5po\@]5S6b'Z�O1T1]5V$O�ø y Q5k-MZ6p'VeT1Z�\@jhV$pfa�TiOXQ7k�T1Q7OXZ�j5Y[Z�Tik-M9b'O1P�poQ5keV�a4ñRV�O1r9a�TiOXP#]7S`ðo\B]7po\B]7SsðßVeT�îNV$V%] b7OXP�TiV%\@]¾Z�]7pfa1Q5ð'a�TiOXZ�TiV#dî�M7\Bk-Ms\@Yfboj@\BV�aËZ�M'\hSRM`Z�üc]7\hT�r�ø F[EÔV0X73�8BV0X73>6-X%CBE%4�&1�È8B6�MPE%4%Z%Ob354,�Ò8��¹4%M¹E���&�CX´:E%MWVª�UCBE%4/�z j35O>M|{)O>M¹V!�*Hj35Ob8<;=3Ob8<;� ��W3>V3��)�=Z%E��PM¹E7\B354�S'3!X%C�V�M+��&�CBO>Ob8B6J4�M¹E��ÔV8Q8<Z76�CBE�C��)�$�JM���8���M¹E�4%Z%Ob354��Ò8��¹4%M¹E���&�;,Z7V0C�V0M¹8<E���O>CBE��W35CB4¥V8QX%M��<XCX´ÏE%MWV!���*MWV0Xx�¹8i�W�z j35O>M|{�O>MWV!�:8B6¥�W81�(CX´:E%MWVª����MWV0XÄX%M)�<Xx�z j35O>M|{�O>MWV!�:8B6�CBE����*X%3>603ÔM¹EÌHj3>V!��3>35E�S8 MWV0Xî603��<C�6D4¾V8ÄH�M¹E%4%MPE���\uM¹E73>V0M¹O���&j8<Z76[3EÄ% ��W8B6JC�V0M¹8<E��,�0Z����B3��VUV0X%C�V�&5�È8B6, %6JM¹8B6G�Ò8��¹4%MPE���&)8<E�0¢6JC�V3��/�0X78<Z��¹4

Hj3Q4%M|Á�Z��0MW8<EÄOb8<E�V608����W3542�*M¹V0X` j8���0MWH#�)�:X%M��<X@8B6JMW35E�V0C�V0MW8<E2�lCBObV8B6��>S[2�8<MPEgV[;,Z%V0C�V0MW8<E��¥��8<Z��P4@Hj3�3EÄ% j35ObV354èV8Hj3ÄC�H��W3ÌV8ñ3EÄu3>60V=\uM¹E73>V0M¹OÏ3EÁj35ObV�w�¹C�6�B3����$H$� OJX�CBE��<M¹E��ñV0X73Ä8-ÁR0¢6JC�V3���&&C��WV0X78<Z��<XF�0;�C�����3EÁj35ObV��8<E§V0X73Ì8<E%06DC�V3��,Ob8<Z��P4ñ603��0Z��¹V4�È608<; OJX%CBE��<M¹E��@V0X73:8B6JMW35E�V0C�V0MW8<E¾�lCBObV8B6��>SGF[E$V0X73�8BV0X73>6�X%CBE%4n&5�Ò8B6,M¹E%4�Z%Ob354 �È8��P4%M¹E���&�C��M¹473Ì6JCBE��B3Ä8��, j8���0MWH)M��¹MWV0MW3��Ô3EÄuM��0V��È8B6¥;QZ7V0C�V0MW8<E�C��13EÁ�35ObV�¥8<E§V0X73@8<E�0�CBE%4 8-Á#0,6JC�V3���&1473� j35E%4%M¹E��G8<E§V0X73;�35OJX%CBE%M+�V0M¹O¥4%3>V0CBM����>S �78B6=3EÄ7CB;� ��W3�&�M)�!Cs��3EÄ7MWH��W3:603��<MW8<E 8NO>O��PZ%47354ïCFý�?h; H ?h;$Ü2��?@>!CE&�;QZ7V0C�V0MW8<E�0n473>V3>6J;�M¹E%354MPE%Ob6035C��3��QM¹E9�)3EÄuMWH)M��¹MWVª�"�0X78<Z��¹4 M¹E%Ob6J35C��3¥V0X73Ï8<E%0¢6JC�V3�D�8<E V0X%3¥8BV0X73>6�X%CBE%4�&sM)�1V0X73��È8B6D;�C�V0MW8<E 8��Ì�V6JZ%ObV0Z76J3��3>603UV0X73[6JC�V3E0!�PM¹;�MWV0M¹E��*�V3� n&7V0X%35EÄ;,Z7V0C�V0M¹8<E%0�473>V3>6J;�M¹E%354ÏMPE%Ob6035C��3��1M¹EÏV0X73G��3EÄ7MWH�M+�¹MWV!���0X%8<Z��¹4Ï4735Ob6035C��3UV0X738<E�0¢6JC�V3BSµ[MWKB35E V0X73w�B6035C�V3>6� j8BV35E�V0M¹C��(�Ò8B6,K�C�6JM¹C�H)M��¹MWVª�s�Ò8B6QM¹E�4%Z%Ob3549�Ò8��¹4%M¹E��@C��,Ob8<;� )C�60354$V8" %6JMW8B6*�È8��P4%M¹E��`�0Z��-0

�B3��0V354èH$�ÄV0X73��3N�V0Z%4%M¹3���&�M¹E%4�Z%Ob354x�Ò8��¹4%M¹E�����8<Z��¹4GHj3�3EÄ% �35ObV354èV8ÏH�3�3��z j35O>M¹C����)�ÌOb8<;�;=8<EîM¹EGE�C�V0Z7603BSÌ3!X%M+�3EÄ% j35ObV0C�V0MW8<EQM��n�0Z� � �8B6JV354UH��[V0X73({)E%4%M¹E�����M¹EUV0X%M��5 �C- j3>65Sn�}E%473>354�&eV0X73�Ob8<;¥;=8<E%E73����8��%4%M��8B6D473>603544�3��NZ735E%Ob3���JZ����B3��V�-V0X73&E73>354�V8UOb8<E��JM¹473>6�6J3>KNM��JMW8<EÔ8��%V0X%3� %6DMW8B65�Ò8��¹4%M¹E��Ì �C�6JCB4%M��<;(CBE%4QX735E%Ob3&C����8[C¥�JM)�<E%M|{)O>CBE�V�603>KuM��0M¹8<E8��-V0X73�O>Z%606035E�V¥¶�35EgV6DC���YI8��<;�C�8���Ñè8��W35O>Z��¹C�6�Å&MW8��¹8����BS

ß às��ì �}þÿ�þ��Iý�è ÿ!ý��âá���ÿ�þ�â�ã�ÿ�b^ã(èRã(ÿ1ÿ��5â3*X73Ì3EÄuM��0V35E%Ob3Ä8���C9�0M��5C�H��W3��È6JCBObV0M¹8<E 8��I4%M+�8B6J473>60354 603��0MP4%Z73���M¹E E%C�V0Z7603ÄM¹;� ��¹MW3��,V0X%C�V�4%M��08B6J473>60354 603��<MW8<E��O>CBEÄCBE�4Ï4%8N #�¹C��¥MP;� j8B60V0CBEgV�608��W3��1MPE:;�CBE��¥H)MW8NODX735;�M¹O>C��R %6J8NOb3���03��>S(3!X%M���X%C��&M¹;� j8B60V0CBE�V�603� j3>6JO>Z���0M¹8<E���8<E;¥CBEe�îC�6035C��U8���H)MW8NODX735;�M¹O>C��sCBE%4¾;=8��¹35O>Z��¹C�6[H�MW8��W8����G603��35C�6JODX�SNÅ�35M¹E��ÌC�H#�W3,V8@CBO>O>Z%6JC�V3��)�2 %60354%M¹ObVG %608BV35MPE4�M��8B6J473>6Ú��8<Z��¹46 %608LKNMP473IMP;�;=354%M¹C�V3[Hj35E73E{�V��V8�Ob6�%�V0C����¹8��B6JC- �X73>6��&CBE%4Ä4%6JZ��=473��0M)�<E%3>6���&NV8�;=35EgV0M¹8<E«RZ��0V&COb8<Z� ��W3U8���C- � ��¹MPO>C�V0MW8<E��>S�Ê�8i��3>KB3>6�&)V8¥8BH%V0CBM¹EÄHj3>VV3>6� �60354%M¹ObV8B6����8<;=3�XNZ76J4��¹3���X�C5KB3�V8¥H�3ÔO��¹35C�60354x{�6��V>S���E�lCBObV�&gV0X%3*4%C�V0CÔ478<;¥CBM¹E�8<E��*X%MPOJX�V0X%M��ß�V0Z%4��,8��# %6J8BV35M¹E�4%M��08B6J473>6�X%C���Hj3>35E�O>C�606DMW354�8<Z7V�X%C��ß�3>KB3>6JC���MPE%X73>6035E�V�PM¹;�MWV0C�V0MW8<E���V0X�C�V*M¹E%�)Z%35E%Ob3[V0X73U603��0Z��¹V�&8��s4�C�V0C�;�M¹E%MPE��QCBE�4Ä\NE%8i���W354��B3Ô4%M��0Ob8LKB3>6�Ì3EÁ�8B60V��M¹EÌV0X%M��1C�6J35C%�

ã \@Y[\hTiV$pÃZ�ñ�Z�\@jhZ�ð'\@j@\hT�rÃP#_¥po\Ba�P�OXp7V$O�p7Z�T1Z�ø YIM+�8B6J473>60354¾6J3��<MW8<E��ÔC�603�4�M|´:O>Z��WVIV8x{)E�4¾H�8BV0XñMPE¾V0X73w�V6JZ�O�0

¹ .

Page 24: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

V0Z76JC���4%C�V0C�H�C��3��ICBE%4GMPE`�¹MWV3>6JC�V0Z%603BSË��E%4%3>354�&%V0X73N�V6JZ%ObV0Z76DC���4%C�V0C�H�C��3��I;QZ��V*Hj3ÔH)M¹C��354@C-�<CBM¹E��V� %6J8-0V35M¹E����*MWV0X��W8<E��Q4%M��8B6J4%3>60354�603��<M¹8<E���&u;�CBM¹E��)�=Hj35O>CBZ��03*8���V0X73U4%M)´:O>Z��WVª�QV8�Ob6�%�V0C����¹M��>3G�0Z�OJXÏ;=8��W35O>Z��W3��5SF[EÄV0X73U8BV0X%3>6�X%CBE%4n&%�PMWV3>6JC�V0Z7603U6J3� �8B6JV�18��-4�M��8B6J473>6J354:6J3��<MW8<E��!C�603*�0O>C�6JOb3,CBE�4ÄZ��0Z%C������¥E78BV!KB3>6�6 %6J3E0O>M��3�C��IV8ÏV0X%3,3EÄ7CBObV4�W8NO>C�V0M¹8<Eè8���V0X78��3�603��<MW8<E��¥�*MWV0X�M¹EÄV0X73N %608BV35M¹E2�3��NZ735E%Ob3��>S43!X�M��*;�C�\B3��UM¹VIX%C�6D4V8G8BH%V0CBMPE¾�0M)�5C�H��¹3=V6JCBM¹E%M¹E��@CBE%4ñV3��V0M¹E��s�3>V�/��X%M¹OJX$M¹EñV0Z76JE9�PM¹;�MWV�[V0X73��0M)�>3¥CBE%4¾ �81��3>6,8��14%M��8B6J4%3>6 %60354%MPObV8B6��>Sm6Y ðo\BS#Q'\+T�rÃ\@]ÃmQÀ�OXZerÃa�TiOXQ7k�T1Q7OXV�a�ø Å�35M¹E���M¹EÄC�Ob6�%�V0C���M��1E78BV*V0X73ÔE78B6J;�C����0V0C�V3Ô8���C� %608BV35M¹E�&%�*X�M¹OJXÄC�603M¹E¾�8��PZ7V0MW8<EñZ%E%4%3>6/ �X��$�0M¹8��W8��<M¹O>C���Ob8<E%4�MWV0MW8<E��>S�3!X%M��UO>CBE CXÁ�35ObVQV0X73¥;=8��¹35O>Z��W3w�V6DZ%ObV0Z76JC�������&5�z j35O>M¹C����)�4%Z73=V8îOb8<EgV0CBObV�*�*MWV0X%MPEñC@Ob6�%�V0C���V0X%C�V�O>CBEf %608LKNM¹4%3=8B6J473>6ÔV8îC@E%C�V0MWKB3��)�¾4%M��08B6J473>64�Ò6JC-�<;=35E�V>S�3!X%M+�;=35CBE��1V0X�C�V1V0X73��3Ô4%M��08B6J473>6&603��0M¹4�Z73��&O>CBEÄHj3,�PC�H�3��¹354ÏC��!8B6J473>60354�&7M¹E�V608u4%Z%O>M¹E��QE78<M+�3UM¹EÏV0X73Ô4%C�V0C��3>V�473>6JMWKB354`�È608<;U�JZ%OJXèM¹E��Ò8B6J;�C�V0MW8<E�S5�P#O1p'V�O�V�òßV�k�Tia�ø 3!X73@C�6J35C����*X73>6J3@Cñ4%M��8B6J4%3>60354 603��<MW8<EÃ�0V0C�60V�=8B6¥35E�4��=O>CBEìHj3Ä4%M|´:O>Z��WV,V8 473>V3>6J;�M¹E%33EÄuCBObV���F�È608<; 35MWV0X73>6wÄ�0¢6JCi�§8B6�»GÑè9 M¹E��È8B6J;¥C�V0MW8<E�S �%8B6:3EÄ7CB;� ��W3�&&Hj3>VV3>6¥6J3��8��¹Z7V0MW8<E M¹E§8<E73sÄ�0¢6JCi�3EÄ$ j3>6JMP;=35EgV�O>CBE,;�C�\B3�8BH��3>60K�C�H��W3�C*Ob8<Z� ��¹3�8����0Z%OJX,Hj8B6J473>6�6J3��0M¹4%Z73��jV0X�C�V7��3>603�MPEgKuM��0MWH#�W3-MPEÔCÌ %6J3>KNMW8<Z���&�W8i��3>6*6J3��8��¹Z7V0MW8<En&N3EÄ% j3>6JM¹;=35E�V>S(3!X%M+��CB4�4��1V8�V0X73,CB;�H�M��<Z%MWV!�� %608BH��¹35; 3EÄ$ ��PCBM¹E7354ÄC�Hj8�KB3BS

ä V$p'Q']5p'Z�]7k�r�ø 2�Z7H��¹MPOÌ %608BV35MPE:4%C�V0C�H)C��3��!X%C�KB3U60354%Z%E%4�CBEgVË�3��NZ735E%Ob3UM¹E��Ò8B6J;�C�V0MW8<E�So3*X%M���M��Ë�z j35O>M¹C����)�=V6JZ%3�È8B6*�V6JZ%ObV0Z76J3�4%C�V0C�H�C��3��*�¹MW\B3=2�Y,Å�CBE%4�&�Ob8<E��3��NZ735EgV����&7»�6�� .�YN&n��X73>603�MWVÔM��UOb8<;¥;=8<E V8GODX735O0\¾V0X733EÁ�35ObV��8��s8<E73E0� j8<M¹E�V!;,Z7V0C�V0M¹8<E��*ÐlMÍS¬3BS)&)OJX%CBE��<MPE��ÕR0Z��V18<E73Ô6J3��0M¹4%Z73UM¹EÌV0X%3/�*X78��W3/�03���Z735E�Ob31Ó�8<E@V0X73N.�Y�V6JZ%ObV0Z%603U8��o %608BV35M¹E��5S

�%Z760V0X73>6I603��35C�6DOJXñM��*H�35MPE��¥O>C�606JM¹354G8<Z7VIV8Ì;�M¹E%M¹;¥M)�>3U8B6[8�KB3>6JOb8<;=3=V0X%3��3,3EÁj35ObV�>S43�8ÏM¹E�Ob6035C��3*�JM)�>3�8���CV6DCBM¹E%M¹E��!4�C�V0C�H�C��3ß�Ò8B6�;�8B603�CBO>O>Z76DC�V3�;�CBODX%M¹E73��W35C�6JE%M¹E��:��3�O>Z%606035E�V�)�4�V0Z%4��,�3>KB3>6JC��NC��WV3>6JE%C�V0M¹KB3�C- � %6J8<CBOJX73���Ò8B6�M¹E�Ob6035C��0M¹E��ÏV0X73�4%M+�8B6J473>60354î603��<M¹8<E��U4%C�V0C�H�C��3BS:R¥���08�&�V8x %608LKNM¹4%3��¹3���[H�M¹C��354¾V3��0V0M¹E���&7�¹8i��60354%Z�E%4%CBE%OE�KB3>6��0MW8<E���8���V0X%3¥ %6J8BV35M¹EÌ4%C�V0C�H�C��3��1C�603UZ%E�473>6�Ob8<E��V6JZ%ObV0MW8<E�S�F[E%Ob3UC��¹C�6�B3>614%C�V0C�H�C��3ÔM+��8BH%V0CBMPE7354�&%��3, ��PCBEV8=3EÄuV35E%4ÄV0X�M��&603��35C�6JODXÄV8�M¹E%O��PZ%473,�0X78B60V14%M��08B6J473>60354Ï603��<MW8<E��:�0M¹E%Ob3[V0X73>603ÔC�6J3Ô;�CBEe�Ï3EÄ7CB;� ��W3��Ë�*X%3>603[V0X73��O>C�6J6�:8<Z%V*M¹;� j8B60V0CBE�VË�ÒZ%E�ObV0MW8<E��>S3�8:3EÄ$ ��¹8<MWV1V0X73,MPE%Ob6035C��354@CBO>O>Z%6JCBOE�@8��o�ÒCB;¥M��)��0!�z j35O>M|{)OG %60354%MPObV8B6���&�C��WV3>6DE%C�V0MWKB3,MPEgV3��B6JC�V0M¹8<EGC- � %6J8<CBOJX73��

C�6J3èHj35M¹E��ïOb8<E��0M¹4%3>60354�SW�}E%473>354n&!3>KB8��¹Z7V0MW8<E¯�3>35;��ÌV8 X%C�KB3 �03� �C�6JC�V354�4%M��08B6J473>6:MPEgV8 4%M��V0MPE%ObV0MWKB3`��C5KB8B6��>SRG��0Z�;�M¹E��[3EÄ7M��V35E%Ob3�8��n�z j35O>M|{)OË %60354�M¹ObV8B6����Ò8B6�C�����4%M��V0M¹E�ObV0MWKB3Ë %608BV35M¹E:4%M��8B6J4%3>6o�)C5KB8B6���&�8<Z76�603��0Z��¹V�(�0Z����B3��VV0X�C�V�MWV�;�M)�<X�VsH�3Ë j8���0M¹H��W3�V8Ô473��0M)�<E=CBE=CBO>O>Z76DC�V3�X���H%6DM¹4� �608BV35M¹E=4%M��08B6J473>6�M¹4735E�V0M|{)O>C�V0MW8<E��z�%�V35;ÄS�Ê�8i��3>KB3>6�&�lZ760V0X%3>6�603��35C�6DOJX M���E%3>3547354 MPE 8B6J473>6QV8¾4%M��0Ob8LKB3>6�M��Ú �608BV35M¹Eï4%M��8B6J4%3>6�O>CBEïH�3ÏO>C�V3��B8B6JM)�>354§M¹E�V8èC2�¹M¹;¥MWV354ENZ%;,Hj3>618��-O��¹C����3��*CBE%4@V8�{)E%4Ì8<Z7VÌ�0V0C�V0M��V0M¹O>C���ODX%C�6JCBObV3>6JM+�V0M¹O��!8��sV0X73��03�O��¹C���3��5SÅ�M¹8��W8��<M¹O>C��ß��$�V35;w��Ob8<E�V0CBM¹E$E73>Vª��8B6J\$�,8��!;=8��W35O>Z��PC�6Ô6035Ob8��<E%MWV0M¹8<E 3>KB35E�V��&sH�8BV0X V8èOb8<E�V608���V0X%3���8i� 8��

;¥C�VV3>6�Ðl;=3>V0C�Hj8��¹M¹O=E73>Vª��8B6J\$��ÓICBE�4ñM¹E��Ò8B6J;�C�V0MW8<EFÐ@�0M)�<E�C��¹M¹E��ÌE73>V!��8B60\%��ÓDS�8ñ3w�z j35O>Z��PC�V3QV0X�C�VUV0X73=35E%X%CBE%Ob3E0;�35EgV=8���V0X73Ä8�KB3>6JC��+�13E´:O>MW35E%OE�ï8��*V0X%3��3@E73>V!��8B60\%�=H$�ïE%C�V0Z%6JC��Ë�3��W35ObV0MW8<EF��8<Z��¹4ïHj36�B6035C�V�)�ö�ÒCBO>M+�¹MWV0C�V354§M)�V0X%3!V0X73>6J;=8u4��uE%CB;�M¹O1CBE�4=\NMPE73>V0M¹OË �C�6JCB;�3>V3>6���8��jV0X73�M¹E%4%MWKuM¹4%Z�C����V3� #��Ob8<Z��¹4�H�3!Z�E��¹M¹E7\B354n&<C����W8i��M¹E��ÔE%C�V0Z76DC���03��W35ObV0MW8<E�V8U8� j3>6JC�V3Ì�*M¹V0XN�08<;=3!473��B603>318���3� �C�6JC�H)M��¹MWVª�U603��<C�6J4%M¹E��,� �35O>M){)O>MWV!��&<CX´ÏE%MWV!��&g8<E%0¢6JC�V3*CBE%4�8-ÁR0¢6JC�V3BSÅ�M¹8��W8��<M¹O>C��$�z�$�0V35;��sC����8[Ob8<EgV0CBM¹EN�*X�C�V7��3�O>CBEQV3>6J;¿�}35E%4�0� �8<MPEgV��;=8��W35O>Z��¹C�6-6035Ob8��<E%M¹V0MW8<EQ3>KB35EgV�>S�7(ÄuCB;�0

#�W3��-8��)V0X73��03&MPE%O��¹Z%473�V0X731ENZ%;=3>608<Z��sX��N4%608��)�NV0M¹O�35E����N;=3���M¹EgKB8��¹KB354=M¹EN %608uOb3���3����¹MW\B314%M��B3��V0MW8<E�&BM¹E%CBObV0M¹KeC�V0MW8<E8���Ob8<;� j3>V0M¹E��Q8B6�<CBE%M��0;w��&�3>V0O�S��78B6Ì�0Z%ODX¥3>KB35E�V��&%35E%X�CBE%Ob35;=35E�V�8���V0X73�3E´ÏO>MW35E%OE��8���V0X%3,� �35O>M){)O-&�M¹E�4%MWKuM¹4%Z%C��6J35CBObV0MW8<E`��8<Z��¹4x�3>35; V8�Hj34�¹MW\B3��)�:V8¥Ob8<E��Ò3>6�CBEÄ3>KB8��¹Z%V0MW8<E%C�6�ÌCB47K�CBEgV0C-�B3BS

å �76J8<; V0X73=C�H�8LKB3=V!��8x �C�6JC-�B6JC- )X���&��3�X�C5KB3=473>KB3��W8� j354¾V0X73�Xe�$ j8BV0X73��0M��IV0X%C�V[35E%4�0� �8<MPEgVG %608BV35M¹E����*M+���;�8��V�)�ÔZ7V0M��PM)�>3ß %6DMW8B65�Ò8��¹4%M¹E���&1�*X%3>6035C��5 �608BV35M¹E��7�*MWV0X%MPE��0M)�<E�C��¹M¹E���&e;=3>V0C�Hj8��¹M¹O-&�8B6s8BV0X73>6�E73>V!��8B60\%�o�*M����<;�8��V�)�Z%V0M��¹M)�>3�M¹E%4�Z%Ob354G�È8��¹4�M¹E��7Sn8ñ3�MPEgV35E%4ÔV8*Z��3� %6J354%M¹ObV0MW8<E[8��u4%M��8B6D473>6��È6J8<; CB;�M¹E78!CBO>MP4/�3��NZ735E%Ob3�C���V0X%3ß�V0C�60V0M¹E�� j8<M¹E�V&V8�V3��V�V0X%M��1X��� j8BV0X73��0M+�>S

¹XÍ

Page 25: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

b^ã�¾�ã�ÿ�ã�ý���ã(è¸ y�º R*Hj8��¹C%&+7*S+7!S)&�Å�3>6JE��V35MPE�&���S¶IS)&�Å�6�<CBEgV�& · S�Ê�S)&%TÔ8�3>Vz���W3�&#3US���S)&)CBE%468ñ35E���&©æ%S��2�608BV35M¹EGYIC�V0C�Å&CBE7\#&Õ�¬'J�ÇX��>�=�ÆhÆ)�Ü�Jz=�È�U�?@� ~N=�>�=eý=-��C��NÇsç�;�ØE��J�±�=�>@?��-; ¬��-;�>!C�;�>S�éèR��ØE>Èsß=-JCÇè�ÇX��>!C�±*�Ã�éèR��?�CE;�>@? ���6®ËÈ�È#Æ×?@��=�>@?@��;���&!354H��$RG���W35En&o��S�Ê,S)&�Å�3>6�B3>6JX78-Áo&ÚµQS)&�CBE%4 · MW3>KB3>6���&�9�S�YIC�V0Cf¶&8<;�;�M���JMW8<E 8���V0X73��}E�V3>6JE%C�V0MW8<E%C��êÞIE%MW8<E 8��¶�6�%�V0C����W8��B6JC- )Xe�BS�Å�8<E%E#Ù�¶1CB;�H%6DM¹4��B31Ù�¶&X73��0V3>65S y ÖeÔi0 y . ¹ & y Û Î Ô�S

¸ ¹1º R¥�WHj3>6�&�3US)&#µUM��WHj3>60V�&%8#S%R,S)&�2-8<E��5M�&#¶[S%9ÔS%CBE%4Ä2-3>V�\B8�&�µQS%R�S��z3!X73Ô9!8��¹3U8��'Ñè8BH�M��¹M¹V!�¥M¹EÌV0X%3 · Z7H��V6DC�V3Å�MPE%4%M¹E�� CBE�4¯¶&C�V0C��)�NV0M¹O"ÑèCBODX%M¹E73>6�§8��Ð7�E����u;=3���&Õ�ÃÑè8BH�M��¹M¹V!�§CBE%4²��Z%E%ObV0MW8<E M¹E 2�608BV35M¹E��:CBE%4²»IZ%O��W35MPOR�O>M¹4���&7354�S7H$����S�Ñ S�9*MPOJX%C�6J4���&�¬'?�ý�=ìën�-I%; H =�>@?@�-;Æè�Ç-±�È��X��?BI%±«�7Û�.$� Í 0 ¹XÍ & y Û Î�¹ S

¸Ï. º R�E%{�E��35E�&߶ISoÅIS)&��2�6JMPE%O>M) ��W3���3!X%C�V�µI8�KB3>6JEìV0X73��%8��¹4%M¹E��è8���2�608BV35M¹EF¶&X%CBM¹E���&Õ�Gè��?�CE;#��C y�Î%y � ¹�¹ .10 ¹ .-Ö%&y Û�Ô-.NS

¸ Í-º R*6JE%8��¹4�&#µQS17!S)&�Y[Z%E7\B3>6i&)R,S�T=S)&©æ<8<X%E���& · SAæ7S�CBE�4@YI8<Z7V0X%C�60V�&j9ÔSAæ%Sß��ÞG�3�8��߶�8<E%4�MWV0MW8<E%C���2�608BH�C�H�M��PMWV0MW3���È8B6�YI3>V3>6J;¥M¹E%M¹E��Ì9!3��PC�V0MW8<E��0X%M� ��,Å�3>Vª��3>35EïRI;�M¹E78ÄRIO>M¹4 · 3��NZ735E%Ob3�CBE%4 2�608BV35M¹E · 35Ob8<E�4%C�6� · V6JZ%ObV0Z76J3�&Õ�ªËJz��>!CE?B;��¤í�è#>@J�I��i>@I$JCÉ��ëI%;#��>@?��-;¾=-; Hïî C�;RC�>@?��E��& y�¹ � . Î�¹ 0ª.�Û�Û$& y Û�Û ¹ S

¸ ½1º R��<C��¹C%&���S%Ñ$S)&�Ò[M¹E%4%M��<E%M�&<R,S)&%»IC��<C���&�Ñ$S)& · j8��¹C�6i&N9�S · S)&79*35Ob8B6J4�&ÚæB65S$Ñ$S�3USuCBE%4ÏY[M�¶&3>6JC%&K7!S)&o�z3!X73>6J;=8-04��NE�CB;�M¹O/�}E�KB3��V0M)�<C�V0MW8<Eñ8���Ê�MW6DZ%4%M¹EGH�M¹E%4%MPE��=V8ÄV0X73 · �W81��CBE�42��C��V/�78B6J;��[8��Ú3!X7608<;,H�M¹En��7�KuM¹4735E%Ob3N�È8B6�78��¹4%M¹E���3�6JCBE��JMWV0MW8<E���M¹EÌV0X73,�}E%X%MWH�M¹V8B6�CBE%4Ä2�608BV35C��3N¶&8<Z� ��W354ÏV8�Å&M¹E%4%MPE���&Õ�{ðBy)�¾��Æ�yòñ�?��-Æ�y�� ¹�½ .$� Ô Î Ôi0«Ô-Û Î &y Û�Û ½ S

¸ É1º Å�M+�0X78� n&�¶IS5Ñ S)&�tNCEI%Jz=-Æ<tNC�>Èsß�-J�Ûi�ÌØ��-Juª�=�>�>!CEJ�;GwÌC���Ü�;�?B>@?��-;K�*F¥Ä%�È8B6J4GÞ�E%M¹KB3>6��0MWVª�î2�603����&�F¥Ä$�Ò8B6J4�& Þ�T�&y Û�Û ½ S

¸ÕÔ º ÅÚ�¹8�8<;=3>6i&�R,S̶[S)&,¶&X%CB;� �E73����&Iæ%SÚ»,S)&,Å�6DM¹Ob8��<E73�&,µ�S)& · V0CB4735En&�9ÔS)&ICBE%4ëT/�¹Z���&�R�S��2�608BV35MPE�YIM+�\§8��3�8BH�CBO>Ob8NÑG8��JCBM¹OÌÒ[MW6JZ���C�V ¹ S ÎôóRI9!3��8��PZ7V0MW8<E · X%8i�*M¹E��UV0X73Ì�}EgV3>6JCBObV0M¹8<E��(8ëMWV0X%M¹E¥CBE%4�Å�3>V!��3>35E · Z7H�Z%E�MWV��&Õ�t�=�>@I%JCE& ¹ Ô É � . É�¹ 0ª. É�Î & y Û�Ô Î S

¸ Î1º YICBZ��<X%476JM��+��&#µQSR8#S'&�¶1X%CB4��3���&Ñ$S · S)&�TÔC�6��¹M¹E��3���&©æ%S$7!S)&ÊIZ��<X73���&jT=S#3ÔS)&�CBE%4èY[CBX����NZ%M��V�&R��SR8.SÚ�z3!X%3¶�0!3�3>6D;�M¹E%C��#Ê�C��)��8���V0X73URIEgV0M|0!�JM)�<;�CN�%CBObV8B6�&��o�)��Ñ[&�Å�35Ob8<;�3�� · V6JZ%ObV0Z%60354w8ëX735E6Å�8<Z%E%4ÏV8���V�:3-C�6�B3>V�&Õ�t�=�>@I%JC�è#>@J�I��i>�y$ñ�?@��Æ�y�� Í � ¹�Î�½ 0 ¹ Û y & y Û�Û�Ô�S

¸ÏÛ º YIZ�E7\B3>6�&�R,S·T=S)&(µ[C�6JE73>6«7!S)&oµUZ%M����¹M¹8BV · S)&�9!8<;=3>6J8è2-S)&�RG�WH%6035ODXgV,T=S)&7ÊIC�60Vsæ%S)&sFIH%6DCB478�KuM¹O¥A-S)&-TÔM���0MPE��B3>6¶IS)&�CBE%4sÒ[M����PC-�È6JCBE�O>C%&µæ%S 7!S)&:�2�608BV35MPEîY[M��08B6J473>6UCBE%4èV0X73a7�KB8��¹Z7V0M¹8<EG8��ßÑè8��W35O>Z��PC�6[9*35Ob8��<E%MWV0MW8<En��3!X73>8B6��&2�60354%MPObV0MW8<E��1CBE%4GFIH#�3>60K�C�V0MW8<E���&Õ�Ī�=���? ���sè�Ç-±¥È%�X��?hI%±§�-;õñÌ?������-±¥È#I�>@?h;�Ü.�7.$� Í Ô y 0 ÍeÎ�¹ & y Û�Û Î S

¸ y Ö º 7�M��035EgHj3>6��&BYQS)&e8ñ35M�����&g9ÔSÕÑ S)&�CBE�4N3�3>6�*M+���¹M)�B3>6�&�3US ¶[S�z3*X73:Ê*3��¹MPO>C���Ê��u47608� �X%8BH�M¹OÚÑG8<;=35E�V���R²Ñè35C��0Z76038���V0X73,R�;� )X%M) �X%M+�¹M¹O>MWVª�Q8��sC�Ê�3��¹M|Ä&Õ�{t�=�>@I$JCÉ� ¹ Û�Û$� .�Ô y 0ª.�Ô Í & y Û Î�¹ S

¸ y�y�º �76JCBE7\B3���&�R,S�YQS�CBE%4ìTÔMP;x&�2-S · S4�zÑè8N4%Z��¹C�6 · V6JZ%ObV0Z%603Ä8��G3�6JCBE��JOb6JM) %V0MW8<Ec�%CBObV8B6����s�};� ��¹MPO>C�V0MW8<E��N�È8B6µI35E73�9*3��<Z��¹C�V0MW8<E�&Õ�'¬(C�ÆhÆ � É�½ � Ô y Ôi0«Ô y Û$& y Û�Û y S

¸ y�¹1º î J�=�; H ¬�U$=�ÆhÆ�CE;�Ü$C���öø÷ø÷�}ùíõú4?)Ü\U¹ª¥CEJBØE��J�±�=-;#��CM¬���±�ÈRI%>@?B;�Üö=-; H ¬��-±�±NI%;�?���=�>@?@�-;��ò�Õ®ûwÌCªÈ��-J�>�ýEÇ >SU%C¬��-±�±N?@>�>!C�C*�-;?ªTUeÇX��?���=-Æ ���¾=�>SU�CE±�=�>@?���=-Æ ��=-; Hhü ;�Ü�?h;RC�CEJ�?h;$ÜhèR��?�CE;R��C���&$�Úý�þBý�ÿ����n¶�����ÿ�þ������ ����*¶����������������ÿ· ���Mý���¤ý���Úþ��$ý�����������������! �"�"�#�$

% �#'&)(�ÿ��*���,+-$/.0$���1Eÿ �*234�657$�89$��6��0þ;:<��ÿ =6�>�6?@$�A@$!BCA�þ�DC��ÿ�E�� ����F+�����EG�Mý�DH���JIK����L ý�M�C����D��~þONP�Mÿ��GD��RQ{ðBySUT�VMyòñ3WXT�VMy��J ZYM[�\][�^6 `_a[�^�b/�c �"�d6 �$

^�e

Page 26: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

% ZY�&)(P�Bý�fZ_hgi=j��G�Mý�ÿ��JNk$��K��ÚþU1Eý�þ����Bý���Oý��!:l$3BC?P�DC��ÿ�þÚý�ÿý�þl+H_h��ý�ÿ�LO�����m?-��L)���n���o�c�-ÿ ��DC�6�m� ÿ����DC�±ý�ÿC_p53q-A8���/� �Bý�� ��D�ý�\Hrm=6�OþBý���¤ýs�t��ÿ3�)I�����þBý�þu8�� ����ý��RQõð6v4SnT�Vwv ñxWyT�V�v�z^�e�e�\ � �{j_� �^�{6�m �"�"�[�$

% �e'&}|~��ÿ����4.�$��JgiDC��ÿ�����y��8z$oBC5x���,��DC�s�Îÿ �����XDP����q-��_p|-��ÿ�þ�Bý�D�DP����ÿ��&ÿ ����ý���I����OþG����\�(�ý�Bý�ÿ����m�����C� ��¤ý�D���ÚþrcBý�ÿ �����!����ý�M� �����D��RQ�ð�T��6�`�,��V�T�����T��~�,���h���XWXT��,��V$ñ3WXT�V�T ���j�,YG�y^���\ `_a^�{6�� �"�"�b/$

% �['&}|~���©ý�ÿ*�657$mB�+�����t��ÿ�L)��� ����G���9�0ýZ�����G����p�)��Úþ��� Do�t�G��Z� ��������9D ����G�w�,������¤ý��FD ��LìýsEÚÿ ����ý���L����Mý������Mý�D��RQ�>�C�o�G� =����y$GY�\]^�b� `_a^�b�[��K �"�b�"�$

% *b*&}|~��� �>�9 �$,57$��91Eý�23�Oý����>+-$9A@$��9q-�D Dý�>�,:l$>89$��zrc=j���D��9 �$zq@$>89$��z5Iý�ý�=�ý�D��45�$��4(�ÿ ��Bý�/�9��ÿ�>�zA7$9:n$��>��Úþ+¡����ÿý���(k$6:n$KBC�x�Býs8������� �����8���ÿ����Z� �Úÿý3���J���|-:¢(~_hg���£7�p_p?-q-A¤+���L�EG�OýZ��?�ýZ�,Úý�D��kqQý�2¥AQÿ���������ý��Z� �Bÿ����:u����ÿ~(�ÿ ���*=�ý@1¡�0þ����}:���� ��a�RQ�¦7���X�6� § � �X�`��¨*�hv � WXT�Vwv � Y�\][�e�b*_a[�[�e��m �"�"�b/$

% �d'&}©��LF�9rx$>r3$��>Nm��ÿ���þ���ÿ��'ª ��>�J57$��4.«�6� ¬���­K��|@$9.�$�����Úþ¢53�������ÿ�þ�D��>I�$>:n$xBC5IýZ�,Bý�Lìý�/�P���c� �BýO+Eÿ���DC� ���8���ÿ����Z� �Bÿ�ýc����53��z��������Mý���Dý¡8z$�+���L�EG��ÿ���DC���23�� �7��Úþ@�µý��p2Eý�ý�@� �ÚýHNm��ÿ������D�5~���9��/�G���Mý���D�ýcA«86��ÿ����Z� �Bÿý�D��RQ� WyT�¨�®6§Z�}W�¯`�X�`�j�9#6 �\ �^�#�{�Y�_� �^�#6 ZY��H �"�"�^�$

% �"'&}©��D D�����ý�ÿ��!+P$�5�$����K��ÿ ��ý��m|@$�r3$��K©7������/�C��>�!?k$!5�$����òý�23��D���+P$��s$��K�<ý���Mý�� �Mý�ÿ��K�m$!A7$���� ý�L�E>�Zf��/¬z��A7$��©�����D �4��N@$6 �$��6������¬�ý�ÿ��6©�$/?k$���86���*2¡������ý�ÿ��65�$/rx$��6:�����ÿ���*2���r3$��6(P��D � �Bý��y���m$/q@$��6|~���G��¬j�6��q7$���+¡�Bý�>�/°@$��:u���Oþ������þ����JI�$���1¡��ÿ ¬�ý�ÿ*�! �$4r3$���1¡����±��Bý�����57$�����Úþ¢NP������±ÿ�������6�J �$4rx$��-B�+Eÿ �6DC� ���c8���ÿ����Z� �Úÿý�DP����|-��L)��+¡������Bý��Úÿ�����ÚþF� �Bý�|-��L)���IK©�1¡�~ �^'_pI!©@e�{�['_i+¡������Bý��Úÿ��u+���L)EG�MýZ�9�RQO¦7���X�6� § � #�b�d�\][jY� `_a[jY�Y��m �"�"�e�$

% ^�{j&}©��Mý�ý��,+-$,1~$��,?Qÿ���ý��C� �6�>(k$,IH$��,��Úþ�|-�����G��ÿ�þ4�6:l$, �$mB�+¡������Bý��Úÿ��>�RQ�²3³�´j���,¨`§`¯7Wt� ü ��µ�����T�VwT ����$0ý�þ>$����A7$G:Çý��DC��ý�ÿ*$G[6 �\ ZYM"'_a^�{�{6�m �"�d�d�$

% ^6 `&}©s��D ������Úþ>�M?k$6rx$KBCA3E�E,������� ����������7� �Bý���ÿ������òý��f��6Lìý~DCEµý����w�z�����p���C�kEÚÿ ����ý��;DC�6M� �Bý�D��D��RQ�¶¡�CT�¨*v9¦7����· V�v²3¨���³�v � ¨�WXv-¸ � ²¹Y�Y�\]"�d'_� �{�Y��� �"�e�d�$

% ^�^'&}© ÿ���2¡��� ¬6�y�95�$9.0$��4|Iý����D ���4�m$��>�$ý�G���M���4�c�z5Iý�ý�þ>�J8z$zg�$��4��Úþ<.Kÿ�����M���>�!$>rx$��oB�8���ÿ����Z� �Úÿ����m8�� �Úþ��Mý�D3���E,^6 �º)»`¼j½a¾C¿zÀÂÁ�½a¾CÃ�ÄCÀt½7�<� �Bý�IBÿ�ý�ýO��ÚþU+êþ�¬�^'_h�9����ÚþU8�� ����ý�\7+�����t��ÿ�L)��� ����G����?-��DC��ÿ�þBý�ÿs:Çý�þ������ý�D�1¡�ÚþG���?-�=�ý�ÿ�D ���a���RQ;¶¡�CT�¨*v!¦7���XVwvJ²~¨��M³�v � ¨�WXv-¸ � ² � "�#�\ � ��]e�{�Y�_� � ��]e�{�"��� �"�"�[�$

% ^�#'&}©s����ý��9 �$z��Úþ<?-�/�������C� �Mý��95�$,I�$¡BCAÅ86�L)EG�Mý7:Çý�� ����þ��t��ÿ-?P�D EG����6���O� �Býk|~��þBÿ ��EG��� �����k+¡����ÿ����Z��ý�ÿ-���m��Îÿ ����ý��4�RQ�Æ6v4SnT�Vwv � WyT�V � �e�b/\ �{�e'_� �#�^��m �"�d�^�$

% ^jY�&}�J��=6����>�mÇk$���1¡����ý�ÿ��Hrx$�A@$���.¥�����Úý�¬,��:l$��m��ÚþÈ8���D D L)��4�! �$K�m$-BC�x�Bÿý�ýZ_ þ��L ý��D ��������c86��ÿ����Z� �Bÿý�D7���A3=6�Oþ�����Úþ�� �Bý�A3=6�Oþ���6_p1¡����� ��+���L�EG�OýZ�z�RQO¶o��T�¨'vJ¦@���XVwv�²3¨���³�v � ¨�WXvs¸ � ²���"�{6\]e�{Mb�['_ae�{�d�{6�c �"�"�#�$

% ^�e'&}�òý�23��D��/:l$��,+¡���������(k$���|~��ÿ �C��>��q@$�+-$���© ý�ÿ����Bý�ÿ���:l$�A@$����K���¤ý���|7$�+-$��G86���/��LO�����Bý�ÿ���:l$�A7$���1Eÿý�����4�5�$c(k$m��ÚþÉ���>�c�!$sB�+Eÿ �6DC� ���38���ÿ����Z� �Úÿý;���-� �BýF�J���Z�C��Dý<Ç-Eµý�ÿ ��È5Pý�EÚÿ�ý�D D DC��ÿ)��ÚþÊgi� DO+���L�EG�OýZ�-ý�D}23�� �?-q-AË��ÚþFg�Úþ����¤ý�ÿ*�RQ � ¨�Wh§Z�,¨`§Z�,^�b� �\ �^jY/b*_� �^�ejY��� �"�"�[�$

% ^�['&}:u��G�����>�GA@$z8z$���Úþ�©��Mý�ý��z+-$,1~$HBCA~�Z� ��=���� ��������m+o������Bý��Bÿ��O���F�J�LO����ý�þF�Îÿ ����ý������D ��D��RQ;¶¡�CT�¨'vJ¦7����· V�v²3¨���³�v � ¨�WXv-¸�v � v̲@v��Gd�{6\ÂYM^�"6 `_hYM^�"�e��c �"�d�#�$

% ^�b*&}qIý�2~L)��>�J:l$��K8���ÿ�f�ý��Mý�� ¬��6�!��$���?-��ÿ�Bý�ÿ����m$JI�$��K8��������þ�¬ùÿ��������9g�$��!��Úþ�A3������ÿ�2����y�KA@$4©�$3B�8���ÿ��G�Z� �Bÿý}���1�A-:Í|3g¡rc0þ���/�G���Mý���D�ý�1�����Úþ��C�O?Pq-A7\,�!��ÿ�� ����4I����OþG������Úþ�Î-��t���Oþ����k���?Pq-A01¡�0þ������RQ � ¨�Wy§��,¨�§��^�[�"�\][�e�['_a[�[�#��m �"�"�e�$

% ^�d'&)Ç-�p2~���*2~DC¬��h��ÏK$��,86���Bý�=6���Cf��G57$�.�$��9Ï9���������57$,(k$��G�J�*23DC��>�9+-$��m$��G ����������LO���¬,�,A7$���:<��ÿ�L���ÿ�D ��ý��>��5�$Ð $��/�����D �y��1-$6I�$�����Úþ�86�����Mý�ÿ*�M�!$/1-$�B�+Eÿ���DC� ���98���ÿ����Z� �Úÿýx���>�$ÿ�E;5Pý�E0ÿý�D DC��ÿ`Ñ'��Eµý�ÿ����C��ÿx+���L�E,�MýZ�}���¡A¡�C��L)��5Pý�DC������ ����>�RQO¦@���X�6�C§��,#�#�e�\]#�^6 ��! �"�d�d�$

^�[

Page 27: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

% ^�"'&}�K���C� ���G�Mÿ���L)����4��q7$�q-��L7�9���-þ��Oÿ��y�/©)$��J�*2Pÿý�����A@$���Úþ�(P���µý�ÿ���1-$���$�BCq-53�4_a#�?@\��}D�ý�±��Bý���¤ýZ_pD ��ÿ����Z� �Bÿýþ���� ���G��D�ýìþBý�ÿ��=�ý�þ��±ÿ ��LÒ� �Bý@E0ÿ ����ý��×þ���� �O�,���¬l�X�c?P1x�i��Úþ¢D�ý���ÿ��������G�Mýk23��� �G��� �Bý}�mg�5 ý�M=6�Mÿ ��GLìý�M��$RQ¶¡�CT��p§ZWt� � § Ó'vJÔk���h��²-�,��V�v,#��ye���\]#�d�b*_hY�{�e��H �"�"�{6$

% #�{j&}�c��j���Z���M©�$�.0$���ÚþO(�ÿ���D D��M:l$4B�ÇP}� �Býog�L�E9��ÿ � ����¤ý¡���91Ðý�����sÎ~��t���OþBý�þ4�RQ7¦7���X�6� § � #�d�[�\][�e�b*_a[�e�d��J �"�"�b/$% #6 `& Ð ���>�4q@$4��Úþl8�ýiªC��'23DC¬6�y�4�s$4 �$xBC�&ÿý�þ���Z� ������ �Bý;8-ý��Z��Úþ���ÿ���8���ÿ����Z� �Bÿý}���x(P�����G������ÿP�&ÿ ����ý���DsÎ-D ���qIý��Bÿ����4qIý��a2H��ÿ�¬�:u��þBý��D��RQFÆ�v4SUT�Vwv � WyT�VÌ�,^�{�^�\]d�[�e'_ad�djY��m �"�d�d�$

% #�^'&}53�*��Lìý�/���xg`$��3|~���OþBý�>�o|@$R:n$��~.Õ����C� ��¬�ý��35�$�:n$��o£m���G>�-+-$�1~$��x�J��ÿý��f��3:l$��3|~���Lìý�D��x©)$¡+-$��x��Úþ5�$RA@$�:<��������>�o5�$¡A7$��OB�86��ÿ����Z� �Bÿý<���s� �Bý¢A~�Z� ��6_pL7����D��¹+���L�EG�MýZ�Ö��0þ«��� D;g�L�EG������� ����D��t��ÿ�:<��D ���Oý+���M��ÿ����Z� ����>�RQ � ¨�Wy§��,¨�§��,^�[6 �\]e�d'_x[�e��J �"�"�#�$

% #�#'&}5Pý�����DC��ý��Bý�ÿ*�¡:l$c��Úþ«5x����ý�ÿ�D��x89$m.�$kBC�cr¡86�Ò8-ý�±��Bý���¤ý�D;��Úþ×5Pý����G���� ����×���É�Îÿ ����ý������D ��D��RQ �>�C�x� �^6 �\]^�[�b*_a^�b� ��m �"�"�[�$

% #jY�&}53��E,�Mý����j1-$j?@$��/¶3���y�p§Z�`�}Ø3§ ¨�T�����WX�XWXT��F���,³~¦k§Z�6�C��V�¦k§��XÙcT���Ú'¯ � +¡��L7�0ÿ��Oþ���ýcÎ-���=�ý�ÿ�D ���p���&ÿý�D D���+¡��L@�Úÿ��Oþ���ý��Î~©��4 �"�"�[�$

% #�e'&}5x��Lìý�ÿ�������$��,ÇP�Úÿ���þ��'=�����,ÏK$��6©7�D D ����ý�ÿ���+P$���N-��������ÿ�������6�6 �$Rrx$���ÚþF?P���¬�ý�ÿ*��A7$R©�$mB�g�þBý�/� ���t�����k?P�DC��ÿ _þBý�ÿý�þ)5Iý��������Dc��)�Îÿ ����ý����D��±ÿ ��LÛA-L)����A-���Oþ;8�ý�±/�Bý�G�¤ý��RQ}¶o��T�¨'v � üÐü&ü � �G�hvH��T�����vJT��;¦k§Z�6�C��V6¦k§��XÙcT���Ú*¯ �|3����D �C��>�G�o°k�4 �\]"�{j_a"�e��! �"�"�b/$

% #�['&}5x��Lìý�ÿ����3�!$��-Ç-�Úÿ���þ��*=6����~Ï!$��x��ÚþÕ?P���¬�ý�ÿ��3A@$R©�$kB�8-ý�±/�Úý���¤ý<?P��� �ÈA-������6D �D)�t��ÿ��4����È?P�DC��ÿ�þBý�ÿ�ý�þ5Pý��������DF�&ÿý�þ���Z� ���Ü�Õ� �Býl+¡������Úý��Bÿ��ÕI���L)�����RQ � ®�§ ü Ww��®/�t®ÞÝ�T���Ú'¯�®�T��ÅT��Þß3§Z�,T��)§ � ����T��`�)���XWX¨�¯��?Qý��¤ý�L@�µý�ÿ@ �^'_� �#��K �"�"�b/�,����¬/�����9 ���EG��4����EÚÿý�D D��4 �"�"�b/$

% #�b*&}5x��Lìý�ÿ����,�!$��>ÇP�Úÿ���þ��'=�����>Ï!$��G©���D D ����ý�ÿ*�,+-$��GNP������±ÿ�������6�z �$Rrx$��>(P��ÿ�Bý�ÿ*�,rx$��>(P�������������,8z$G��0þ�?P���¬�ý�ÿ��A7$R©�$kBC�x������D���Úþ�D)�����&ÿ ����ý���D��J�¬�ý����È�C�Ê|-��=�ý��4����l?P�DC��ÿ�þÚý�ÿý�þÖ5Iý��������D��RQ«¶3��¨�W àH¨ � ���~�6Tj¯`W��6�áT��� WyT�¨�T��~�,���XW��/� � #�\ÂYM#�e'_�Y�YM[��! �"�"�d�$

% #�d'&}5x��D�ý���(k$M?k$���BC�&ÿý�þ���Z� ���}���9��������� �Úÿ��D��}�������,�����ÿ�EÚÿ ����ý����DK��)���/�-þÚÿ ��EG�����G���c�G��D��D��RQ@¦@���X�6�C§���^�b�^�\e�d�['_ae�"�{6�! �"�b�d�$

% #�"'&)86���/2Eý�ý�ÿ�D��GÇk$��G86������M�Úÿ����6_p|-��Bý��µý�� ¬z��r3$���:u��ÿC�9��A@$���Úþ�:<��ÚþBý���¬��'2���rx$�B�8���ÿ��G�Z� �Bÿ����zDC� �Úþ��Mý�DH���4� ���EÚÿ ����ý��É��ÚþÉA-��f��Bý���Lìý�ÿ�EG���Mÿý�þÈ�Bý���������H�,���Lìý�/� D)D ���'2â��ïý�=6�OþBý���¤ýF�t��ÿ)��_pDC��ÿ����Z� �Bÿý��RQÖÆ � WyT�V7��®6§��k�^�[�"�\]^jYM^�"�{j_a^jYM^�"�{Mb��c �"�"jY�$

% Y�{j&)86��������f���(k$6rx$���BCq-�����Mý���� �OþBýP1¡�Úþ�����7�Îÿ�����ý���D��RQ)SUT�V�§�¨��6Vw���xSl§ ¨�®�����W�¯��âT�� � WyT�VwT���Wy¨���V,Øx§�¨�T ����WX�XWXT�� � ��rc�D�ý�=6�Mý�ÿ`Ñjq~��ÿ � �6_c|~������0þF1����Lìý�þ�������>�&ÿý�D D��Bý�þ>$G�/��:n$,1��������G��>�,b�"'_a"jY��K �"�b�"�$

% Y� `&)8�E9�����ÿ��65�$G8z$���Úþ�5Pý��Z��ÿ�þ>�G �ÿ�$�:l$��s$���B�+�����EG�����7���KI����OþG���k�C�;86����ýZ_i8�Eµý����w�,�~1¡�Úþ����7�����&ÿ ����ý���D¡�C�?-q-A@�RQ � ¨�Wy§��,¨�§ � ^�[�#�\ãb�b*_ib�djY��� �"�"jY�$

% YM^'&kN-�����Bý�>�4:l$��K�J��ÿ ¬�¬6���6�Jr3$J��ÚþU5~���¬���Bý�>����$-BCA~�����Úÿ����Z�����o�Îÿ ����ý��nI!�OýZ�6���,�����a���Îÿý�þG��Z� �����D��RQ<¶¡�CT�ä�p§ZWt��¯Zå � �X�`��¨��X�6� § �Kæ ���z¨��XWyT�� � ���z³¢ß3§Z�z§��XWX¨�¯ � �"�\ ZY� `_� ZYM"��m �"�"jY�$

% YM#'&k.Ký��Bÿý��J�6�!$�|@$��zÏ9�Bý�4��.0$����!�/��4�GA7$�.0$��,+���/2��*���,©�$�A@$�����ÚþF�����DC�G�Bÿ����6�!$��s$�BCq-A3+¡�!�GA0�Îÿ ����ý��giL�E,��������ý�þÈ�ÊA~��f��Úý��Lìý�ÿ�çRD}?P�D�ý���D�ý���0þÊ�$ý���ÿ�������mgiD}q-��� ��=�ý����ÈÎ~������OþÚý�þ>�RQ � WXT�¨�®6§Z�}W�¯`�X�`� � #�e�\ �#�bj{�"'_ �#�b� �e��! �"�"�[�$

^�b

Page 28: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

% Y�Y�&k.Ký�ÿ �9��D�����$�� � §Z��T��z³3Øx§h���C§Z¯�¯`WXT��zå�¦k§ZÙ � T�T�Vã¯z��T��m¶¡� § ³�Wy¨��XWt�/�7���,³3²-�,��Vã�j¯�W�¯cWt�O�t®6§ � §Z®���´*WyT��C��V � ¨�Wy§��,¨�§Z¯ �|~��ÿ =���ÿ�þ�Î-���=�ý�ÿ�D ���p�����H�>$R?k$�� �Bý�D ��D��4 �"�b'Y�$,5Iý�EÚÿ��/��ý�þ��/��.¥���Mý���èÛ8����D��4 �"�"�e�$

^�d

Page 29: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

éëê ì3ízízîoï9ð

ñGòôó�õ*ö�÷Jø�õ'÷JöjùÈú û�ù/ö'õ'ütý�ö'þÈó�õ*öj÷�ø�õ'÷�öjù�ÿ�x�Býk�Z��L�EG�Mý���ý�#'_9þ��Lìý�GD ���������D ����Eµý����c�;EÚÿ ����ý��õÿý�EÚÿý�Dý�M� DP��� Dk�p§Z�Z�XWX������¯Z�X����¨��X�6� §Z�923��������2Eýhÿý���ý�ÿ�C�O��DxD ��L�EG���O#�? DC��ÿ����Z� �Bÿý�$�gi�x������0þBý�D¡����o������;� �Bý�D�ý��Z��Úþ���ÿ���DC��ÿ����Z� �Bÿý ý��Mý�L ý�M� D����,���x���DC��� �Bý��OÿDCEG��� ����¡E9��D �� ����È��ÚþÈ��ÿ��Mý�/� ��� ����É��ÚþÈ� �Bý��������� ����È����ý������«���C��LF$×�x�Bý��X����Z� ����Ê���P�¢EÚÿ ����ý��É��D� ���������/�x�C�{þBý�ÿ���=�ýs��ÿ���L ��� D3#�? D �G��E©ý�$

����� ü�õ`þû���ù�!ü �� ü ��� ó�õ*ö'ù ��� õ �����-ý��!ö �Gõ*ù6ü ��� ó*÷���ó�õ*ö'ý�õ*ù¢ø��������tù����}û ��ù�õ'ü � �zõ*ù/ö�õ ��ù!�!ü �� ü ����" õ ��ù��ü � �Jù�öOõ#�Jù<ý �$� ü�õ�þ%���xõ ��ù�ø&�������tù����

� �Êü � �UýGøMü ó�x�Bý;�G����OþG�����G���6� ¬6Dk���xEÚÿ ����ý��GD��!��LO���¢�����Oþ�Dk��ÿý�D�L)����m��ÿ���������L����Mý������Mý�D@� �����}�9��ÚþU2~��� �U��Bý������ �Bý�ÿ-�F�)���G�������¬�ýP�X��D ��������C�O����ÿ�L EÚÿ ����ý���D�$!gi�K���Bý�L)�������JL���þ��w�,����� ����D¡��ÿý7�������ÿ�ý�þ>��� �Bý�ÿý���ÿý�G��D ����������u�a2Ðý�/�p� þ��w­µý�ÿý�M�@��L)���������OþGD7�UG��� �Bÿý�$�A~��K���o� �Úý�L D ����ÿ�ýO���Z��L)L���Ê�Z��ÿý�DC��ÿ����Z� �Bÿ�ý('� �Bý��F��ÿý�þ��w­µý�ÿý�/� �����ý�þF���FD �OþBýs���G����Dx���*=����� þ��w­µý�ÿý�/�¡���Bý�L)������JEÚÿ ��Eµý�ÿ � �Mý�D�$

� õ�õ*ö�ü)�K÷Jõ*ùA ���Lìý�ÿ�������H=�����Bý;���������������ý�þÊ�*=�ý�ÿO�<DCEµý����w�0ý�þl/�GL7�µý�ÿk���3�Z���D�ý������ �=�ý���LO���¢�����Oþ�D@������ý�È������Mý�þ�¢23�Úþ��*2 % Y�&*'@ýZ����L�EG�Mý�D��G����ÚþBý��M��þBÿ ��EG��� �/� % ^�#j&h�H�/�-þÚÿ ��EG�����G���;L���L ý�M� % �{�&h�H�0ýZ�����G������p� % YM^j&x��ÿD �L�E,���O��L)���)�����Oþ��Z��L�E9��D ��� ��� % #�b'&h$

+ ý�ø#,-�.� � ùA �Z��M� ��/�����GD3��Úý���ÿ3����������t��ÿ�Lìý�þ���D~2¡����ý�ÿP��D@ÿý�L��'=�ý�þ×þG�Bÿ����}�9��Úþ�����ÿ�LO��� ������µý��p2Eý�ý�u� �Bý@�Z��ÿýDC��ÿ����Z� �Úÿý�Do���K��þjªC���¤ý�/�~��LO���)�����Oþ�D�$

+ ü �� ü ����Îÿ ����ý����D!�G�Úþ7��ÿm���C� �������C�P��� �Bý�ÿmL����Oý������Mý�DK�@��ÿ�þBý�ÿK�C�s����ÿÿ �7�����!� �Úý��Mÿ��,�������Bý�L)������/�X����Z� �����D�$��x����DEÚÿ �6�¤ý�D D¡�D�DC��Lìý�� �Lìý�DEÿý��±ý�ÿÿý�þ;�C����DP�)T�V�§�¨��6V����s�C§�¨�T ����WX�XWXT��G$H�o2��k��L�E9��ÿ � ��M�¡��DCEµý��Z� D����4�G�0þ�������ÿý� �Býx�#/;���p���t� ����M� Bý�D�D��!��Úþ}� �BýxDCEµý����w�z�����p�;�t�,�Úþ����3�C��DCEµý����w�,��L����Mý����G�Mý�DÄÿ���� �Bý�ÿ�� ����}��� �Úý�ÿcD �L)�����ÿ��Bý�D���$

+ ü �� ü ��� ó*ü�õ*ùû���ù<ö'ù � ü0� � ü � ý���ö#��õ'ù�ü � �1�2��ù�øM÷��tù43���ù�ö'ù5�!ü �� ü ��� õ*ý�,Gù�ó6���tý�øMù��87Zõ�ü�ó;ü0���.�,ö*õ*ý � õ�õ9�Uõ ��ù�!ü �� ü ��� ó'ü�õ'ù�õ9���mùuýGø�ø�ù�ó*ü0���tù<õ9�Uõ#�Jù5��ö#��õ*ù6ü �.: ó)ó'÷;�!ó�õ*öjý�õ*ù�ó(�

< �������tù���o2��)��ÿ3L���ÿý@L����Mý������Mý�D¡�9����0þ;�C����ý�� �Úý�ÿ~�t��ÿ�L �)�Z��L)EG�MýZ�9$

= �tù�ø�õ*ö#� �> ù � ó'ü�õ`þ?�lý@��x�Býs���t��ÿ�L)��� ��� ÿ�ý�D ����� ���@�±ÿ ��Lë� �BýsD �����C��ý�ÿ�����)���4��_�ÿ��*��Do� �Úÿ ��������� �Bý�L����Oý������Mý�Do�����¤ÿ �6DC� ���y$m�x�Úý#�?¹E9��D ��� ����DK���4�Úþ��=��OþG�����/���C��LOD���)�@L)���Mý������Mý3����;�µýIþBý���ý�ÿ�LO�Bý�þ��±ÿ ��LÛ�� D&ý��Mý��Z��ÿ��� þBý�GD ���p��L)��EJ$

A ù/ý�õ'÷JöjùA×EÚÿ��-þ��G�Z�����,EÚÿý�EÚÿ �6�¤ý�D D ����~��E�E,��Mý�þ@����-Dý��!���9���C��ÿ����,����ý�DB'���������éý���� �Bý�ÿK�µý¡��Bý¡���G��ÿm�P�Z��L@�G����� �������K� �Býs��ÿ������G���>���C��ÿ����G����ý�D�$

A ��ù��Jü0�!üC�Xü�õ�þAÒL ý���D �Bÿý����-� �Bý�����EG�������a�Ê���P�ïÿý�������È���-EÚÿ ����ý���l�C�l��ÚþBý�ÿ �������6�����oL���� ����GD�$Ê�3���D}����EG�������a�È��D�j­©ý��Z��ý�þu����DC��ý�ÿ���s�/��ý�ÿ����Z� �����D~��L�����)� �Bý�Úý���ÿ �/����L)���)�����OþNÿý�D ��þ��Bý�D�$

^�"

Page 30: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

D �������0� � �,÷�ó6�!ö �Gõ*ù�ü � ó�ùFE4÷Jù � øMù/ó��GöG�;�2�1�2�)� � ÷�ù/ó.Õ�Úý�O�a2H�}��ÿ¡L���ÿý3E0ÿ ����ý���DH����=�ýsD �LO����ÿmD�ý�±��Bý���¤ý�D¡��Úþ;��ÿýQÿ�ý������ý�þO���ìý�=������� ������ÿ � þBý�D �¤ý�/����ÿ ��L�O�Z��L)L)��u����¤ý�D �C��ÿ��,� �Úý�����ÿý@D ����þ��C�O�µý7����L�������������D~�C�O��Býk������ �Bý�ÿP��Úþ���ÿ�ý@������Mý�þU®�T��)T�V�T ���G§Z¯�$.Õ�Úý�U� �Bý�ÿý;�D����ÿ�ý���DC��n�C�u�µý���Mý�=�ý�� ������� �Úý��ÆþBý�D �¤ý�Úþ��±ÿ ��L ���Z��L)L���Ê����¤ý�DC�C��ÿ��!� �Bý��U��ÿýsªC��D �������Mý�þ¢¯`W��}WtVw����$��x�Bý��Bý�L���������G��D��±ÿ ��L =���ÿ�������Dx��G�L)���D¡��ÿý�ýZ����L�EG�Oý�Do��������L�������������DxEÚÿ ����ý���D�$

D þ ö#���!ý�õ �zþ�x�Bý���ý�0þBý���Z�����K� �Bý7D �OþÚý������������K�{ÿý�D �OþG�BýP�C� þ��D�DC����=�ý���2¡����ý�ÿ�$¡.Õ�Úý��� ÿý�D��Oþ��Býs�Dx���DC������,�Mý-��2�����ý�ÿ*�9��3�D3�������Mý�þ�®M��³��CT��G®6T&HZWy¨��42~����Mýs2¡����ý�ÿsDC������G�Oý ÿý�D �Oþ��Úý�Dx��ÿý}������Mý�þ�®/��³���T��,®MW�VÌWy¨�$P�x�Bý@�*=�ý�ÿ�����ý�M��þBÿ ��E,��� �M��������EÚÿ ����ý����±ÿ�����Lìý�/�3�D¡� �Úý�ÿý�����ÿ�ý�ÿý������ý�þ��C�O��� DoDC������G�����a�O��2¡����ý�ÿ�$

D þ ö#���I�����Kü�ø!�1�2�nù � õ.Õ�Úý���kEÚÿ�����ý�����ÿ�����L ý�M�o��D D �GLìý�D¡�kDý��Z��Úþ���ÿ �OD ��ÿ����Z� �BÿýPD ����Eµý��6���¬�ýP��KJ4_p�Úý���w�)��ÿo� L>_pD �Bý�ý������ �Býþ��DC��ÿ����G��� ��������m�/��þBÿ ��EG�����,��s��Úþ<�M��þBÿ ��EG�G����Qÿý�D �OþG�Bý�D3��������O� �BýkDC��ÿ����Z� �Bÿ�ý@����×þBý���ý�ÿ�L)�Úý@�¤ý�ÿ � ���EÚÿ ��Eµý�ÿ � �Mý�D�$�I���ÿéýZ�6��L�E,�Mý������oL���DC�k���o� �Bý��/��þBÿ ��EG�����,��éÿý�D �OþG�Bý�D7�l���JJ_p�Bý�����U�t����H�U��Úý;D �OþÚý)���� �BýuD ��ÿ����Z� �Bÿý��¡23�� �×L���DC�;���s� �Bý��/�-þBÿ���EG�������;��Ö� �Bý���� �Úý�ÿ;D �OþÚý���� �Úýu�Bý�����È����DO� �Bý�E0ÿ ��Eµý�ÿ �p�Ê����µý����F2¡����ý�ÿ@DC������G�Mý}��U��Bý;D �OþBý��t23�G�����2~���!��ý�ÚþU�C�u�µýìýZ��E9��D�ý�þ���n� �BýOD �Úÿ �t���¤ýO����� �Úý)EÚÿ ����ý��z���Úþ¢��DC�������G�Mý���<� �Bý}��� �Bý�ÿ)�t23�G����<23����4�X���¤ýk�C�F� �Úýk�GD �OþBý@���m� �Bý�L����Mý������Oý'��$��x�Bý}±/����/� ��� �Mý�D-� �����Lìý���D �Bÿ�ýc� ���D��M��þBÿ ��E,�����G������a�-��L7�G��������¤ýc�� J4_p�Úý����¤ý�D!��ÚþML>_pD��Bý�ý�� DK��ÿý��������Mý�þ8JHäK���,³NLmäa®M��³��CT��G®�T�HZWy¨�)T��O§Z�G�X�Aÿý�DCEµý��Z� ��=�ý�����$

O �2��ù�øM÷��tý�ö�ö'ù�ø�� �2� ü�õ'ü0� �8-ý�ý8+ ü �; ü �;� $

P ý�õ'ü)Q,ùR��þ ütóS�,ö ù/öjù �,ö � ý�õ'ü)QzùF��þÖ÷ � �T��� ù ó�ù�E4÷�ù � ø�ùAËD�ý�±/�Úý���¤ý�� �����Iþ��ùý�Dx����x������þ��/�C�)�)D �����OýP�G��±��Bý�#�?¤DC��ÿ����Z� �Úÿý���ÚþBý�ÿoE,�M�6D �����������������>�Z��Úþ���� ����GD�$86������D�ý�±/�Úý���¤ý)L)�����/�s����=�ýO��;�G�-ý�þ�DC��ÿ����Z� �Bÿý}23����� D �ùý�=�ý�ÿ;�i�C���,³MT�� ¨�T�WtVÂ������ÿs�µýkE,��ÿ � �������F�t���OþBý�þ4�����=6���)Dý��Z��Úþ���ÿ �FDC��ÿ��G�Z� �Bÿ����µý��Mý�Lìý�/� Do�G���o23��� �FD ���,DC� ��M� �����z�0ýZ�6��G�����a�u�i�)T�Vw�p§Z����V�T&H���V§���$

UWV�� öjý�õ*ùû���ù<ö'ý�õ'ù�ý�õW3��!ütø#�«ýUø��2�1�I�tù&�×ó*ù��!ý�öjý�õ*ù�óOü � õ9�lü�õ*ó�ø�� � ó�õ'ü�õ'÷Jù � õX�����tù�øM÷���ù�ó(�

UY��� ö'ý�õ*ùû���ù�ö'ý�õ'ùOý�õZ3��!ütø#�nõ ��ù��Kü �; ü �;� ���cõ[3\��ó�ùF�!ý�ö'ý�õ*ù������tù�øM÷��tù�ó7ü � õ9��ý�ø��������tù���õ*ý@,,ù/óZ�I�tý�ø�ù��

U ÷Jõ � ��� � ó�ý������tù�$ý�D � ���)��D ������ þ���� �)D�ý��3� �����3�Z��/� ����D3���Býs����� �Úý�ýZ�6��L)EG�Mý�Do�±ÿ ��L � �Býs��ÿ���������D�ý���$

] ý�õ�õ'ù/ö �A � ��EG�Mý-�������C��ÿ����,����ý�D¡��ÿo��ý���� �Úÿý�Dx��D DC�6�������ý�þ�23�� ���}���=�ý�FD�ý�±/�Úý���¤ýsE9��D ��� ����>��������Lìý�/��ý�þF23��� ��� �Bý���Z� �����J������D Do���K� �����xE9��D ��� ���¢�X���� ���Dx����D�ýuB���ÿ�þBý�ÿý�þ�Q)��ÿOB�þ��DC��ÿ�þBý�ÿý�þ�QM��$

^ ù�ó*ü ÷�ù.Õ�@_�¢�z��0þ����;23��� �<��`_������� �`_�ÿ����;E,���MÿP������L)�����������þ�Ds��Úþ`_�ÿ������ ÿa_����Z� ���¢23�`_�ÿa_}� �`_��<���/��Da_}�2����b_�ÿ-L����c_������d_�$�86�������z��0þ`_�þF��L)���)������þ�Do��ÿa_7������d_�þ��C§Z¯�Wy³��G§`¯`$

e ù�ø�� �� ýGö*þÖó�õ*öj÷�ø�õ'÷�öjù�x�`_ìÿa_�D��Oþ��`_�Ds����EÚÿ ���b_��UDa_�±/�`_�G�f_O����Æÿ ��� ���b_���ÿ ����Úþ¢� �@_)EÚÿ ���b_��n�������4�4��ÿ7�G����¬/�9��`_��!������D ���� �`_kEÚÿ ���b_��¢L����c_����G�c_7�C���t���Oþu��M�C���Z��L�EG�c_Z�¢#'_9þ��LW_��D���������JD�����Eg_�D�$-A¤����=(_�<EÚÿ ���b_��u��ÿ�����LW_�M�s����

#�{

Page 31: 0/ )0 1zoran/papers/romero00j.pdf) b - &- ) ) %& # < : & ` + ) $ + " ( ) & $ # ·

� ��¬(_~��@_x���>Db_�=(_�ÿ����,�G��D ��oD �G��E2_�D��ML)������)®6§�VãWch��,¯�®6§�§��G��ÿ3V�T�T��,$c�3�`_P¯�§�¨�T��,³M�����}¯Z�X����¨*�X��� §c���>��EÚÿ ���b_����Z���D �D � Do���K� �`_s�p��Eg_7��ÚþF���6����� ����F���K� �`_�Db_7�G��D ��sD �G��E2_�D¡2~��� ����� �`_�L����d_������c_�çRDxDb_�±��`_���f_�$

iCjMkml#nboBp*q �,ö�r�s p*q�l rFt pTuFv e ù�E4÷�ù � ø�ùÈúb�!öjüC�lý�ö'þÈó�õ*öj÷�ø�õ'÷�öjù�ÿ�x�`_�Db_�±��`_�/� ����������ÿ[w`_�ÿa_Sw¢��DC�-���&ÿx_�D �dw��`_�DP�¢��EÚÿ ���b_���<�������>$k�x���D-��D �-DCEg_����w��_�D~� �@_k��ÿ[w`_�ÿs���c� �`_D �dw`_s��������Do� �G���yw�������c_s�±ÿ ��L � �@_7�Z��ÿa_��G����¬/�9��`_�D ��ÿ����Z� �Bÿa_�$

e �mù�øMü)z!ø/ü�õ`þû���ù×ý@�KüC�Xü�õ`þ{����ý|��ö#��õ'ù�ü � õ9�|�Kü �; � � ��þ0õ9�Üó�ùR�tù/ø�õ*ù ó*÷;�!ó�õ*öjý�õ*ù�ó(� � ��ö#��õ*ù6ü � õ ��ý�õ� � ��þý�ø�ø�ùF��õ*óY� � ù!�Gö;õ[3\���Kü �; ü �;� ��ý�õ�õ*ù�ö � ó)ütó)ó�ýGü õ9�1�mù�!ü � ����þÖó9�mù/ø/ü}zKø`�

e ÷���ó�õ'ö'ý�õ'ùû���ù�1�2��ù�øM÷��tù�õ9�13���ütøm�Öý1��ö#��õ*ù6ü � �Kü �; ó�õ9�lø�ý�öjö*þ>�,÷Jõ)óS���lù5�i÷ � ø�õ'ü0� � �

#6