Séminaires : Séminaire Variétés Rationnelles

Equipe(s) : tga,
Responsables :Cyril Demarche et Mathieu Florence
Email des responsables :
Salle :
Adresse :Campus Pierre et Marie Curie
Description

 

Le séminaire a généralement lieu à Jussieu (Sorbonne Université, Paris), un vendredi par mois, entre 14h30 et 17h.

http://math.univ-lyon1.fr/homes-www/gille//sem/sem_variete_archives.html


Orateur(s) Mikhail Borovoi - Tel Aviv,
Titre Real models of spherical homogeneous spaces.
Date15/11/2019
Horaire16:00 à 17:00
Diffusion
Résume

Let G be a connected reductive algebraic group over the field of complex numbers C. Let Y=G/H be a spherical homogeneous space of G (a homogeneous space of special kind). Let G_0 be a real model (real form) of G, that is, a model of G over the field of real numbers R. In the talk I will discuss the following question: does there exist a G_0-equivariant real model Y_0 of Y? This is interesting even in the case when G = G' x G', where G' is a connected semisimple group over C, and H=G' embedded diagonally into G' x G'. (Our results immediately generalize from R to any field of characteristic 0.) This is a joint work with Giuliano Gagliardi (Tel Aviv - Hannover). No preliminary knowledge of spherical varieties will be assumed.

Salle15-16-413
AdresseCampus Pierre et Marie Curie
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