Descripción del proyecto
Avances en la teoría de la representación de grupos reductores sobre campos locales
El análisis armónico nos ayuda a comprender los sistemas físicos en muchas áreas de aplicación. La teoría de la representación de un grupo topológico es un análisis armónico no conmutativo sobre el grupo. El proyecto RelRepDist, financiado por el Consejo Europeo de Investigación, se centrará en la teoría de la representación de grupos reductores (algebraicos) sobre campos locales, como el grupo lineal general sobre el campo de los números reales o el campo de los números p-ádicos. Muchas herramientas relacionadas con esta teoría son específicas de uno u otro tipo de campo. El proyecto ampliará varias herramientas, lo que permitirá aplicarlas a todos los campos. Al aplicar estas herramientas junto con las que ya existen, se obtendrán varios resultados nuevos en análisis armónicos no conmutativos. Entre las importantes herramientas que este proyecto pretende mejorar significativamente se encuentran los modelos generalizados y degenerados de Whittaker.
Objetivo
One can view the representation theory of a topological group as non-commutative harmonic analysis on the group. For compact groups this view is justified by the Peter-Weyl theorem. The relative representation theory of a group is harmonic analyses on spaces with transitive group action.
I work in relative representation theory of reductive (algebraic) groups over local fields, e.g. the general linear group over the field of real numbers or the field of p-adic numbers. This theory has applications to the theory of automorphic forms, in particular to the relative trace formula.
There are many similarities between the real and p-adic cases, and some results can be formulated uniformly for all local fields, but their proofs are usually specific to each type of local fields. An important tool in this theory, that is applicable for all local fields, is the analysis of equivariant distributions on the group. However, this analysis is quite different for the two kinds of fields.
In the first part of this proposal I describe my ongoing work on some tools that will help to approach invariant distributions uniformly for all fields. I also propose to advance, using those tools, towards the proofs of some long-standing conjectures on density of orbital integrals, comparison of Lie algebra homologies, and classification of (non-compact) Gelfand pairs.
The second part of this proposal concerns generalized Whittaker models, or equivalently harmonic analyses on the quotient of a reductive group by a unipotent subgroup. In 1987 Moeglen and Waldspurger comprehensively described the role of a representation in this harmonic analyses in terms of a certain collection of nilpotent orbits attached to this representation. This result, as well as previous results on Whittaker models have many applications in representation theory and in the theory of automorphic forms. I propose to obtain an archimedean analog of this result.
Ámbito científico
Programa(s)
Régimen de financiación
ERC-STG - Starting GrantInstitución de acogida
7610001 Rehovot
Israel