{"id":140013,"date":"2026-01-12T17:50:52","date_gmt":"2026-01-12T17:50:52","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sobre-la-teoria-espectral-de-los-operadores-positivos-y-los-semigrupos-fuertemente-continuos\/"},"modified":"2026-01-12T17:50:52","modified_gmt":"2026-01-12T17:50:52","slug":"sobre-la-teoria-espectral-de-los-operadores-positivos-y-los-semigrupos-fuertemente-continuos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/matematicas\/sobre-la-teoria-espectral-de-los-operadores-positivos-y-los-semigrupos-fuertemente-continuos\/","title":{"rendered":"Sobre la teoria espectral de los operadores positivos y los semigrupos fuertemente continuos."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Josep Martinez Centelles <\/strong><\/h2>\n<p>La primera parte de la memoria se ocupa de la teoria espectral esencial de los operadores positivos. En particular, se establece la monotonia del radio espectral esencial para operadores am- compactos y para operadores entre espacios de tipo l1 y c(k). Ademas, se obtienen condiciones que garantizan la casi-compacidad de un operador.  la segunda parte de la memoria se dedica a la demostracion de teoremas de la aplicacion espectral para semigrupos perturbados, bajo ciertas condiciones de continuidad.  por ultimo, se construye un homomorfismo de representacion para una contraccion positiva, lo cual permite deducir una prueba simple de una \u00abley del 0-2\u00bb.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sobre la teoria espectral de los operadores positivos y los semigrupos fuertemente continuos.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sobre la teoria espectral de los operadores positivos y los semigrupos fuertemente continuos. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Josep Martinez Centelles <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Universitat de val\u00e9ncia (estudi general)<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1992<\/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>Fuensanta Andreu Vaillo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Miguel Sanz Alix <\/li>\n<li>Manuel Gonzalez Ortiz (vocal)<\/li>\n<li>Rainer Nagel (vocal)<\/li>\n<li>Vicent Caselles Costa (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Josep Martinez Centelles La primera parte de la memoria se ocupa de la teoria espectral esencial de [&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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