# Séminaires : Séminaire Groupes Réductifs et Formes Automorphes

 Equipe(s) : fa, tn, Responsables : Alexis Bouthier, Benoît Stroh Email des responsables : alexis.bouthier@imj-prg.fr, benoit.stroh@imj-prg.fr Salle : Adresse : Description

 Orateur(s) Hans-Jürgen SCHNEIDER - , Titre On the alternating square of a Lie algebra Date 24/02/2011 Horaire 14:00 à 15:00 Résume The Lie bracket of a Lie algebra $L$ induces a linear map $L \wedge L \rightarrow L$. When can the kernel of this map be generated by vectors of the form $x \wedge y$ with $[x,y]=0$? This seemingly elementary question does not seem to be tractable by elementary methods. For semisimple Lie algebras over the complex numbers Kostant has given a positive answer by means of representation theory. I will explain why a number theorist is interested in this question over fields of positive characteristics. I will sketch a solution for the Chevalley form of any split semisimple Lie algebra (joint work with O. Venjakob). Salle Adresse