Séminaires : Séminaire d'Algèbres d'Opérateurs

Equipe(s) : ao,
Responsables :Pierre Fima, François Le Maître, Romain Tessera
Email des responsables :
Salle : 1013
Adresse :Sophie Germain

Orateur(s) Damian Sawicki - ,
Titre On super-expanders and counterexamples to the coarse Baum-Connes conjecture obtained from dynamical systems
Horaire14:00 à 15:00

I will introduce a construction that given an action on a compact space outputs a metric space. Dynamical and ergodic properties of the action correspond to quasi-isometry invariants of that metric space (called the warped cone).

I will explain how this can be used to construct a continuum of super-expanders comparable with these of Lafforgue and will sketch the proof of a conjecture of Druţu and Nowak that such spaces yield new counterexamples to the coarse Baum--Connes conjecture.

AdresseSophie Germain