Listar AGT - Conferencias Científicas por título
Mostrando ítems 55-74 de 74
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Primitive graph algebras
(2014-06-18)Let $E = (E^0, E^1, s,r)$ be an arbitrary directed graph (i.e., no restriction is placed on the cardinality of $E^0$, or of $E^1$, or of $s^{-1}(v)$ for $v\in E^0$). Let $L_K(E)$ denote the Leavitt path algebra of ... -
Quiver representations for Leavitt Path algebras as talented monoid classification detour.
(2024)There is a correspondence between quiver representations and path algebras. In this talk, we will see Leavitt Path algebras as a special case for such representation and how it will take a role in its classifications in ... -
Recent results on (p,q)-Laplacian type equations
(2017-05-09)Start ing from a new sum decomposit ion of W1,p(RN ) ∩W1,q(RN ) and using a variat ional approach, we invest igate the existence of mult ipleweak solut ions of a (p, q)–Laplacian equat ion on RN , for 1 < q < p < N , ... -
Reconstruction of graded groupoids from graded Steinberg algebras
(2016-05-19)We show how to reconstruct a graded ample Hausdorff groupoid with topologically principal neutrally-graded component from the ring structure of its graded Steinberg algebra over any commutative integral domain with 1, ... -
Rigid singularity theorems in Lorentzian Geometry
(2014-10-02)The importance of the singularity theorems in Lorentzian Geometry, which give su cient conditions on a spacetime entailing the incompleteness of its null or timelike geodesics, is well known. But equally important is to ... -
Simple locally finite Lie algebras
(2013-12-12)A Lie algebra is called locally finite if all its finitely generated subalgebras are finite dimensional. We will discuss some approaches towards classification of simple locally finite Lie algebras and give various ... -
Spectrum of the Laplacian on homogeneous spaces.
(2024)We will start with an introduction and stating general results on the spectral properties of the Laplacian before we investigate the restriction to manifolds which are symmetric. We consider the difference of spectral ... -
Subvariedades atrapadas en el cono de luz
(2020-02-14)El concepto de superficie atrapada fue formulado orginalmente por Penrose en 1965 para el caso de superficies espaciales bidimensionales en espaciotiempos tetradimensionales, en términos de los signos o de la anulación de ... -
Superficies de curvatura no positiva en la esfera tridimensional.
(2024)Demostraremos que toda esfera analítica bidimensional $S$ inmersa en $S^3$, con curvaturas principales $k_1,k_2$ cumpliendo que $k_1 k_2\leq 0$ debe ser totalmente umbilical. Esto mejora algunos resultados bien conocidos ... -
Superficies mínimas: viejos problemas y nuevos avances
(2018-10-18)Haremos un recorrido por los principales problemas abiertos de la teoría clásica de superficies mínimas en el espacio euclídeo tridimensional, y cuáles son los últimos resultados en este campo. -
Un teorema fundamental de hipersuperficies en espacios alabeados semi-Riemannianos
(2014-03-27)Obtenemos condiciones necesarias y suficientes para que una variedad semi-Riemanniana admita una inmersión isométrica local en ciertos productos alabeados. -
Teoría de Hopf Galois: Introducción y enfoque aritmético
(2018-10-05)La teoría de Hopf Galois es una generalización de la teoría de Galois usando álgebras de Hopf, y surge en 1969 de la mano de S. U. Chase y M. E. Sweedler, con la idea de reemplazar el grupo de Galois de una extensión de ... -
The kernel of the Gysin homomorphism for Chow groups of zero cycles.
(2023)Let S be a smooth projective surface over a field k, and let C be a smooth hyperplane section of S. For a closed embedding of S into a projective space P consider the linear system Σ of hyperplane sections and the ... -
The lattice of ideals in the Steinberg algebra of a strongly effective groupoid
(2023-07-05)A topological groupoid is generalization of topological group where the binary operation is only partially defined. Ample groupoids are a special class of topological groupoid that have an especially well behaved topology. ... -
The Talented monoid of a graph and its connections with the Leavitt path algebra
(2022)In this talk, we introduce an algebraic entity arising from a directed graph - the talented monoid. The talented monoid has an interesting relationship with the Leavitt path algebra. In fact, the group completion of the ... -
¿Tiene sexo la mente?
(2014-05-13)La respuesta obvia es: NO. Pero entonces ¿por qué no aparecen mujeres en la historia de la ciencia? Si revisamos la historia con otros ojos, encontramos que las mujeres han tenido papeles muy relevantes en la ciencia y la ... -
Topological restrictions in Lorentzian geometry: a survey
(2020-03-09)It is well know that globally hyperbolic solutions (M,g) of the Einstein field equations in general relativity may have initial data Cauchy hypersurfaces with any topology. However, some restrictions on the fundamental ... -
The topology and geometry of the space of null geodesics
(2020-02-14)This talk will provide a general introduction to the space of null geodesics. I will begin with a discussion of the case of Minkowski space, a special case with a great deal of structure. After this, I will move on ... -
Un tratamiento unificado para álgebras de Katsura y álgebras de Nekrashevych
(2014-04-22)En esta charla se hará una breve presentación de las C*-álgebras de Katsura y las C*-álgebras de Nekrashevych. Tras ella, se definirá una clase de C*-álgebras conteniendo ambas clases, y se presentarán como C*-álgebras de ... -
Ultraproductos de C*-álgebras, su semigrupo de Cuntz y sus (cuasi)trazas
(2019-07-29)Discutiremos cómo el semigrupo de Cuntz de un ultraproducto de C*-álgebras se puede determinar en función del semigrupo de las álgebras individuales. En este proceso se usa la noción de escala en el semigrupo así como un ...