Cyril Houdayer

Professor of Mathematics

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Groups and Operator Algebras seminar (2022-2023)

Organizers: Camille Horbez and Cyril Houdayer

Mondays, 2PM-3PM, building 307, room 2P8, Université Paris-Saclay, Orsay

Next Talks

Monday June 12

Daniel Drimbe (KU Leuven)

tba

Monday June 19

Shuoxing Zhou (Université Paris-Saclay)

tba

Previous Talks

Monday September 12

Cyril Houdayer (Université Paris-Saclay)

The noncommutative factor theorem for higher rank lattices

Monday September 26

Rachel Skipper (ENS Paris)

Braiding groups of homeomorphisms of the Cantor set

Monday October 10

Itamar Vigdorovich (Weizmann Institute)

The space of characters, its dynamics, and applications to arithmetic groups

Monday October 17

Omar Mohsen (Université Paris-Saclay)

An introduction to maximally hypoelliptic differential operators and index theory

Monday October 24

Federica Fanoni (CNRS & Université Paris-Est Créteil)

Generating big mapping class groups

Monday November 14

Gonzalo Emiliano Ruiz Stolowicz (EPFL)

Hyperbolic representations of groups and functions of hyperbolic type: the case SL2(R)

Monday November 21

Anne Lonjou (Université Paris-Saclay & University of the Basque Country)

Cremona groups over finite fields and Neretin groups

Monday December 5

Itamar Vigdorovich (Weizmann Institute)

The simplex of traces of a group or of a C*-algebra

Monday January 9

Matthieu Joseph (Université Paris-Saclay)

Invariant random subgroups of Polish groups

Monday January 23

Sami Douba (IHES)

Dense subgroups of simple Lie groups via bending

Monday January 30

David Xu (Université de Lorraine)

Convex cocompact representations into the group of isometries of the infinite dimensional hyperbolic space

Monday February 13

Lukas Rollier (KU Leuven)

Quantum symmetries of connected locally finite graphs

Monday February 20

Antonio Lopez Neumann (Ecole Polytechnique)

Vanishing of the second L^p-cohomology group for most higher rank semisimple Lie groups

Monday March 13

Camille Horbez (CNRS & Université Paris-Saclay)

Measure equivalence rigidity among the Higman groups

Monday March 27

Jialun Li (CNRS & École polytechnique)

Random walks on Lie groups and transfer operator

Monday April 17

Filippo Sarti (University of Turin)

Rigidity for measurable cocycles via bounded cohomology

Monday April 24

François Le Maître (IMJ)

A characterization of high transitivity for groups acting on trees

Monday May 15

Jingyin Huang (Ohio State University)

Introduction to Garside groups

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