# Séminaires : Séminaire d'Algèbre

 Equipe(s) : gr, Responsables : J. Alev, D. Hernandez, B. Keller, Th. Levasseur, et S. Morier-Genoud. Email des responsables : Jacques Alev , David Hernandez , Bernhard Keller , Thierry Levasseur , Sophie Morier-Genoud Salle : 001 Adresse : IHP Description

 Orateur(s) Matt SZCZESNY - Boston, Titre Hall algebras and representation theory over the field with one element Date 26/03/2012 Horaire 14:00 à 15:00 Résume I will describe several examples of non-additive categories where the Hall algebra construction makes sense. These should be viewed as $F_1$ analogues of abelian categories. Examples include categories of Feynman graphs, monoid representations, coherent sheaves on projective monoidal schemes, and quiver representations over $F_1$. The resulting Hall algebras include the Connes-Kreimer Hopf algebra of Feynman graphs and rooted trees and (nilpotent halves of ) enveloping algebras of Kac-Moody and loop algebras. Salle 001 Adresse IHP