Listar AGT - Conferencias Científicas por título
Mostrando ítems 15-34 de 74
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Determinación algorítmica de estructuras Hopf Galois
(2018-10-15)La teoría Hopf-Galois es una generalización de la teoría de Galois. La clave es sustituir los grupos de Galois por álgebras de Hopf y la acción de Galois por una cierta “acción de Hopf” que actúa por endomorfismos. Este ... -
Endoregular Modules
(2014-04-02)We will discuss modules whose endomorphism rings are von Neumann regular, which we call endoregular modules. Characterizations and properties of endoregular modules will be presented. For example, it is shown that a direct ... -
Engaños ópticos y artificios perspectivos
(2014-03-27)Título de la conferencia: "Engaños ópticos y artificios perspectivos" La conferencia incide en las relaciones que las disciplinas del Arte y la Ciencia han mantenido históricamente a través de la Geometría, tomando como ... -
Entropy of local homeomorphisms with applications to subshifts arising from infinite graphs.
(2024)In this talk, we introduce topological entropy for dynamical systems generated by a single local homeomorphism (Deaconu-Renault systems). More precisely, we propose and compare entropy definitions via covers and via separated ... -
Estructura de anillo de la cohomología de Hoschild de álgebras de Sridharan
(2016-10-07)Sridharan probó en [Sri61] que toda álgebra filtrada cuyo graduado asociado es S(V) para algún espacio vectorial V, está determinada salvo isomorfismo por una estructura de Lie sobre V y la clase de cohomología de un ... -
Extensión global de campos vectoriales locales en espacios Pseudo-Finsler I, II.
(2016-02-24)El problema de extensión global de campos locales (Killing, conformes, etc.) en variedades Pseudo-Riemannianas aparece naturalmente en múltiples contextos. Por ejemplo, es un ingrediente esencial en la prueba de que el ... -
Extension problem associated with socle of monomial algebras.
(2024)We show that a monomial algebra Λ over an algebraically closed field K is self-injective if and only if each map soc(ΛΛ) −→ ΛΛ can be extended to an endomorphism of ΛΛ, and provide a complete classification of such ... -
Extremal elements in Lie Algebras
(2014-12-10)The main result discussed in this lecture is an elementary proof of the following theorem: If L is a simple Lie algebra over F of characteristic distinct from 2 and 3 having an extremal element that is not a sandwich, ... -
Factorization of Ideals in Leavitt Path algebras
(2017-04-04)After pointing out how ideals in a Leavitt path algebra L of a graph E behave like ideals in a commutative ring, we shall consider the question of factorizing an arbitrary ideal I as a product of finitely many special type ... -
G2 and the rolling ball
(2017-05-09)Understanding the exceptional Lie groups as the symmetry groups of simpler objects is a long-standing program in mathematics. Here, we explore one famous realization of the smallest exceptional Lie group, G2: Its Lie ... -
Generalized Cohomological Field Theories in the Higher Order Formalism
(2023)In the classical Batalin—Vilkovisky formalism, the BV operator is a differential operator of order two with respect to a commutative product; in the differential graded setting, it is known that if the BV operator is ... -
Geodesic connectedness of a spacetime with a causal Killing vector field.
(2024)We study the geodesic connectedness of a globally hyperbolic spacetime (M, g) admitting a complete smooth Cauchy hypersurface S and endowed with a complete causal Killing vector field K. The main assumptions are that ... -
Geometric assumptions and variational tools in Lorentzian geometry
(2014-10-02)During the past years there has been a considerable amount of research related to the problem of geodesic connectedness of Lorentzian manifolds. In particular, some geometric sufficient conditions have been introduced so ... -
Geometries from structurable algebras and inner ideals
(2020-02-12)Se estudian ciertos tipos de geometrias en algebras estructurables via sus ideales internos abelianos. -
Gradings on classical Lie algebras via sesquilinear forms over graded-division algebras
(2022)En esta charla de aproximadamente una hora el profesor Dr. Mikhail V. Kochetov nos introduce en las últimas técnicas usadas para clasificar graduaciones sobre ciertas álgebras de Lie clásicas. Técnicas usadas en su monografía ... -
A gravitational collapse singularity theorem that improves Penrose's
(2020-03-09)The global hyperbolicity assumption present in gravitational collapse singularity theorems is in tension with the quantum mechanical phenomenon of black hole evaporation. In this work I show that the causality conditions ... -
Groupoids and Steinberg Algebras
(2016-03-15)A groupoid is a generalisation of group in which composition is only partially defined. In first half of this talk, I will give an overview of groupoid theory and show how groupoids provide a unifying model for a number ... -
Groupoids in analysis and algebra.
(2023)Groupoid algebras are studied in both analytic and algebraic contexts. In analysis, groupoid C*-algebras play a fundamental role in the theory and include many important subclasses. Steinberg algebras are their purely ... -
Grupos p-locales finitos y grupos de cohomología
(2013-12-10)Definimos ciertos espacios topológicos llamados grupos p-locales finitos e introducimos una sucesión espectral que calcula su cohomología en ciertos casos, incluyendo algunos grupos p-locales finitos "exóticos". Presentaremos ... -
Homeomorphism groups of the cube and other n-manifolds
(2016-04-25)In this talk, the structure of the homeomorphism group of the cube is presented. Applications to the homeomorphism groups of other n-manifolds are also treated.