{"id":39059,"date":"2018-03-09T09:38:58","date_gmt":"2018-03-09T09:38:58","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/on-the-slope-and-geography-of-fibred-surfaces-and-theefolds\/"},"modified":"2018-03-09T09:38:58","modified_gmt":"2018-03-09T09:38:58","slug":"on-the-slope-and-geography-of-fibred-surfaces-and-theefolds","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/matematicas\/on-the-slope-and-geography-of-fibred-surfaces-and-theefolds\/","title":{"rendered":"On the slope and geography of fibred surfaces and theefolds"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Miguel \u00e1ngel Barja Y\u00e1\u00f1ez <\/strong><\/h2>\n<p>En la tesis se estudian problemas geogr\u00e1ficos de variedades algebraicas complejas en dimensiones 2 y 3 (superficies y s\u00f3lidos). En primer lugar se obtienen cotas inferiores para la autointersecci\u00f3n del divisor can\u00f3nico en superficies y s\u00f3lidos can\u00f3nicos.  se obtienen resultados de globalizaci\u00f3n y extensi\u00f3n de morfismos definidos en la fibra general de una superficie fibrada.  se estudian los invariantes de una superficie fibrada sobre una curva. se dan cotas en los casos siguientes:  * cuando la fibra general tiene morfismos de grado dos sobre otra curva.  * cuando la fibraci\u00f3n no es el morfismo de albanese.  * cuando la superficie posee otras fibraciones.  adem\u00e1s se estudia con detalle la franja inferior del rango de existencia de los invariantes num\u00e9ricos de la fibraci\u00f3n.  en el caso de los s\u00f3lidos fibrados sobre curvas se demuestra que la caracter\u00edstica de euler algebraica relativa es no negativa en general. se dan cotas inferiores para las relaciones de los invariantes num\u00e9ricos de la fibraci\u00f3n en este caso, clasificando los casos de invariantes bajos.  finalmente se demuestra parcialmente una conjetura de fujita sobre la semiamplitud de fibrado imagen directa del haz de diferenciales relativas de una fibraci\u00f3n.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>On the slope and geography of fibred surfaces and theefolds<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 On the slope and geography of fibred surfaces and theefolds <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Miguel \u00e1ngel Barja Y\u00e1\u00f1ez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/12\/1998<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Juan  Carlos Naranjo Del Val<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: gerald Welters dyhdalewicz <\/li>\n<li>pere Pascual ca\u00ednza (vocal)<\/li>\n<li>fabrizio Catanese (vocal)<\/li>\n<li>daniel Hernandez ruiperez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Miguel \u00e1ngel Barja Y\u00e1\u00f1ez En la tesis se estudian problemas geogr\u00e1ficos de variedades algebraicas complejas en dimensiones [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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