Ara mostrant els elements 15-34 de 50
Arias de Reyna Domínguez, Sara (Data de defensa: 2009-06-04)
The background of this dissertation is the inverse Galois problem.<br/>Which finite groups can occur as Galois groups of an extension of the rational field? This problem was first considered by D. Hilbert, and it still ...
Heiderich, Florian (Data de defensa: 2010-09-13)
This thesis is about Galois theory.<br/><br/>The development of a Galois theory for differential equations analogous to the classical Galois theory for polynomial equations was already an aim of S. Lie in the 19th century. ...
Amorós Torrent, Jaume (Data de defensa: 1997-01-01)
Estudiem el grup fonamental de varietat algebràïques complexes i la seva monodromia. Les línies d'estudi són:<br/><br/>- L'àlgebra de Malcev dels grups fonamentals de varietats compactes Kahler: Provem que no pot ser lliure, ...
Castellet Solanas, Manuel (Data de defensa: 1972-12-01)
En un trabajo no publicado y con vistas a la teoría de cuerpos de clases, J. Tate modificó los grupos "o" de cohomología de un grupo finito G con coeficientes en un G-módulo A, de tal manera que los nuevos grupos obtenidos, ...
Plans Berenguer, Bernat (Data de defensa: 2003-04-30)
En aquesta tesi estudiem versions refinades del problema invers de la teoria de Galois sobre el cos Q dels racionals, que s'obtenen quan prefixem determinades condicions de ramificació. Ens plantejem, per exemple, les ...
Miró-Roig, Rosa M. (Rosa Maria) (Data de defensa: 1985-01-01)
Esta memoria pretende contribuir al estudio de haces reflexivos sobre espacios proyectivos en los dos aspectos siguientes: (A) Caracterización de las clases de Chern de haces reflexivos sobre espacios proyectivos. (B) ...
Cantero Morán, Federico (Data de defensa: 2013-07-03)
In this thesis we study the space of compact connected oriented genus g subsurfaces of a fixed manifold M, and in particular its homological properties. We construct a “scanning map” which compares this space to the space ...
Cirici, Joana (Data de defensa: 2012-06-23)
In the present work, we analyse the categories of mixed Hodge complexes and mixed Hodge diagrams of differential graded algebras in these two directions: we prove the existence of both a Cartan-Eilenberg structure, via the ...
Amorós Carafí, Laia (Data de defensa: 2016-12-16)
The Langlands program is a vast and unifying network of conjectures that connect the world of automorphic representations of reductive algebraic groups and the world of Galois representations. These conjectures associate ...
Àlvarez Montaner, Josep (Data de defensa: 2002-05-27)
Sigui R l'anell de polinomis amb coeficients en un cos k de característica zero. El nostre objectiu és, tot seguint la linia de recerca encetada per G. Lyubeznik, utilitzar en profunditat la teoria de D-mòduls per tal ...
Gutiérrez Marín, Javier J. (Data de defensa: 2004-09-10)
EN CASTELLANO:<br/><br/>La localización es una técnica bien conocida en álgebra conmutativa y geometría algebraica. Muchas de las propiedades formales de las localizaciones de módulos son compartidas por otras transformaciones ...
Costa Farràs, Laura (Data de defensa: 1998-09-01)
This thesis seeks to contribute to a deeper understanding of the moduli spaces <i>M-sub X, H (r; c1,., Cmin{r;n}</i>) of rank <i>r</I>, <i>H</i>-stable vector bundles E on an <i>n</i>-dimensional variety <i>X</I>, with ...
Colomé Nin, Gemma (Data de defensa: 2008-07-14)
A first goal of this thesis is to contribute to the knowledge of cohomological properties of non-standard multigraded modules. In particular we study the Hilbert function of a non-standard multigraded module, the asymptotic ...
Travesa i Grau, Artur (Data de defensa: 1988-02-25)
Aquesta memona està dedicada a l'estudi dels nombres d'extensions abelianes en dos casos importants. En el primer capítol treballem en el cas local. Sigui K una extensió finita de Q(p); M. Krasner el 1.966 i J-P. Serre el ...
Feliu Trijueque, Elisenda (Data de defensa: 2007-11-29)
The results of this thesis contribute to the program of developing a higher arithmetic intersection theory. These results constitute chapters 3 and 5. Chapters 2 and 4 consist of the preliminary results needed for chapters ...
Sáez Cornellana, Meritxell (Data de defensa: 2014-07-16)
This thesis studies curves in the symmetric square of a curve, C(2). We characterize them, study their immersion in C(2) and deduce properties of the curve C from the existence of curves in C(2) of specific type. In addition, ...
Fernández Sánchez, Jesús (Data de defensa: 2004-11-01)
The original interest in sandwiched singularities comes from a natural question posed by J. Nash in the early sixties to H. Hironaka: “Does a finite succession of Nash transformations or normalized Nash transformations ...
Miranda Galcerán, Eva (Data de defensa: 2003-09-22)
En esta tesis se estudia el problema de clasificación de estructuras simplécticas definidas en un entorno de una órbita singular compacta de un sistema completamente integrable sobre una variedad simpléctica para las cuales ...
Lavila Vidal, Olga (Data de defensa: 1999-01-01)
The aim of this work is to study the ring-theoretic properties of the diagonals of a Rees algebra, which from a geometric point of view are the homogenous coordinate rings of embeddings of blow-ups of projective varieties ...
Nualart Riera, Joan (Data de defensa: 2016-02-03)
The main goal of this thesis is to contribute to the explicit hyperbolic uniformization of Shimura curves. We will restrict to the case of curves attached to Eichler orders in rational quaternion algebras whose maximal ...