22/11/2018, Aula 27, 14:30 hs FAMAF Time-Band-Limiting para funciones matriciales. Expositor: Ignacio Zurrián Resumen: El tema de la limitación de time-band-limiting, que se origina en el procesamiento de señales, está dominado por el «milagro» de que un operador integral que aparece naturalmente admite un conmutante diferencial que permite una manera numéricamente eficiente de calcular sus funciones…
8/11/2018, Room 27, 2:30 pm, FAMAF The adjoint algebra for tensor categories. Speaker: Noelia Belén Bortolussi Abstract: Representation theory and category theory are useful tools for the study of groups and Hopf algebras. In this talk, we shall introduce the background to understand the notion of characters in the context of tensor categories. This concept was…
8/11/2018, Aula 27, 14:30 hs FAMAF El álgebra adjunta para categorías tensoriales Expositor: Noelia Belén Bortolussi Resumen: La teoría de representaciones y la teoría de categorías son fuertes herramientas en el estudio de los grupos y las álgebras de Hopf. En esta charla explicaremos las herramientas necesarias para entender la noción del álgebra de caracteres en…
25/10/2018, Room 27, 14:30 hs FAMAF Matrix valued spherical functions and multivariable matrix valued orthogonal polynomials Speaker: Erik Koelink Abstract: For a specific case of a symmetric pair $(G,K)$ corresponding to the group case $SU(n+1)$, we discussmatrix-valued spherical functions as a generalization of the spherical functions, which arise as bi-K-invariant functions. The main input is an…
11/10/2018, Room 27, 14:30 hs FAMAF Burchnall type identities for orthogonal polynomials Speaker: Erik Koelink Abstract: L.J. Burchnall (1892-1975) proved a converse to the linearization formula for Hermite polynomials in 1941. In doing so, he calculated powers of a differential operator in terms of Hermite polynomials and (standard) derivatives. We show that this approach generalizes to…
27/9/2018, Room 23, 16:30 hs FAMAF How to lift Speaker: Agustín García Iglesias Abstract: In this talk, we will give a detailed introduction to a technique of deformation of graded Hopf algebras that we introduced, in joint work with various authors, and which was successfully employed to conclude the classification of finite-dimensional pointed Hopf algebras with…
27/9/2018, Aula 23, 16:30 hs FAMAF How to lift Expositor: Agustín García Iglesias Resumen: En esta charla daremos una introducción detallada a una técnica de deformación de álgebras de Hopf graduadas que desarrollamos en conjunto con varios autores y que pudimos aplicar con éxito para concluir la clasificación de las álgebras de Hopf punteadas de dimensión finita,…
13/9/2018, Room 27, 14:30 hs FAMAF Hopf algebra with basic Hopf coradical Speaker: Iván Angiono Abstract: The Lifting Method, which was introduced by Andruskiewitsch and Schneider in the late 1990s, has been very fruitful for the problem of classification of Hopf algebras (of finite dimension). In fact, it has led to the classification of all pointed…
13/9/2018, Aula 27, 14:30 hs FAMAF Álgebras de Hopf con coradical de Hopf básico Expositor: Iván Angiono Resumen: El Método del Levante introducido por Andruskiewitsch y Schneider a fines de los ’90 ha sido muy fructífero para el problema de clasificación de álgebras de Hopf (de dimensión finita). En efecto, ha permitido la clasificación de todas…
30/8/2018, Room 27, 14:30 hs FAMAF On the SO(n+3) to SO(n) branching multiplicity space Speaker: Fiorella Rossi Bertone Abstract: Let be an irreducible representation of a compact Lie group G. Consider the restriction of to a closed subgroup L of G. In general, this restriction is not irreducible and its decomposition as irreducible L-modules is called…