Groupoids and operator algebras. Applications to analysis, geometry and dynamics.

21 mai 2019, 13:00 → 24 mai 2019, 14:15 Europe/Paris

Hôtel Dupanloup (Orléans)

Conference in honor of Jean Renault

This conference aims to bring together mathematicians working on groupoids and operator algebras, a field in which Jean Renault has been an expert for many years. The theory is rich enough to have applications in very different fields such as analysis, geometry and dynamics. This meeting will definitely be a great opportunity to discuss these applications. We would like to highlight the central role played by groupoids as a unifying language and to promote them among young researchers.

Download titles and abstracts (pdf).
Download the poster (pdf).

Abstracts.pdf

Poster.jpg

mar. 21 mai

Welcome

Some observations regarding the contributions of Jean Renault as seen from Boulder, Arlan Ramsay

1 Groupoid methods and singular spaces in free analysis

Orateur: Paul Muhly (University of Iowa)

Muhly.pdf

Coffee Break

2 Blowup and deformation groupoids in relation with index theory

Orateur: Claire Debord (Université Paris Diderot)

Debord.pdf

3 Witten deformation and Lie groupoids

Orateur: Omar Mohsen (Université Paris Diderot)

Mohsen.pdf

4 Remembering Victor, Alla Kuznetsova and Jean Renault

Orateur: Alla Kuznetsova (Kazan Federal University, Institute of Physics)

Kuznetsova.pdf

Renault.pdf

mer. 22 mai

5 Pseudodifferential operators from tangent groupoids

Orateur: Robert Yuncken

Yuncken.pdf

Coffee Break

6 Diffeological groupoids and their operator algebras

Orateur: Iakovos Androulidakis

Androulidakis.pdf

7 Stability of Lie groupoid C*-algebras and of C*-algebras of singular foliations

Orateur: Georges Skandalis (Université Paris Diderot)

Skandalis.pdf

Lunch

8 Fourier integral operators on Lie groupoids

Orateur: Stephane Vassout

Vassout.pdf

9 K-theory, groupoids and propagation

Orateur: Herve Oyono-Oyono

Oyono.pdf

Coffee Break

10 The homology of ample groupoids and the Matui conjecture

Orateur: Alex Kumjian

Kumjian.pdf

11 CCR flows associated to closed convex cones

Orateur: Sundar Shanmugasundaram (Institute of Mathematical Sciences)

Sundar.pdf

jeu. 23 mai

12 A groupoid approach to classifiable C*-algebras

Orateur: Xin Li

XinLi.pdf

Coffee Break

13 Weak Cartan subalgebras of C*-algebras

Orateur: Ruy Exel (UFSC & UNL)

Exel.pdf

14 Groupoids from minimal dynamical systems

Orateur: Karen Strung (Radboud University)

Strung.pdf

Lunch

15 Crossed products and amenability of group actions

Orateur: Siegfried Echterhoff

Echterhoff.pdf

Visite de la cathédrale d'Orléans

Conference dinner

https://www.restaurant-lachancellerie.fr

ven. 24 mai

16 On the first cohomology group of a free minimal Z^d-action on the Cantor set

Orateur: Thierry Giordano

Giordano.pdf

Coffee Break

17 On non-standard limits of graphs and some orbit equivalence invariants

Orateur: Damien Gaboriau (CNRS Ens-Lyon)

Gaboriau.pdf

18 Classification of regular subalgebras of the hyperfinite II_1 factor

Orateur: Stefaan Vaes (KU Leuven)

Vaes.pdf

Lunch