Mini-conference in group theory

Orsay, december 16 and 17th access

Groups acting on rooted trees and groups acting on CAT(0) spaces

The purpose of the conference is to gather people who understand how interesting examples of groups can be obtained
from automorphism groups of rooted trees (resp. of CAT(0) spaces) and how information on these groups can be obtained from the action on the tree (resp. CAT(0) space).

Speakers

L. Bartholdi, S. Brofferio, A. Erschler, V. Kaimanovitch, N. Monod, V. Nekrashevych, Y. Shalom, A. Zuk

Schedule

All lectures are held in Petit amphi (Bâtiment 425, ground floor).

Thursday, dec. 16th

10:00 V. Kaimanovich (CNRS, Rennes): Amenability, self-similarity and entropy
11:30 A. Erschler (CNRS, Lille): Poisson boundary of groups acting on rooted trees

Lunch at 1pm at the Bures cafeteria (230)

2:30 V. Nekrashevych (Intern. Univ. Bremen): Groups acting on rooted trees and Julia sets

Tea break

4:00 L. Bartholdi (EPFL Lausanne): Finite-type algebras associated to groups acting on
rooted trees

Friday, dec. 17th

9:00 S. Brofferio (Univ. Paris-Sud): Poisson boundary of random rational affinities

Coffee break

11:00 N. Monod (Univ. Chicago): Superrigidity and splitting

Lunch at 12:30 at the Bures cafeteria (230)

1:30 A. Zuk (CNRS, Inst. Math. Jussieu): Automata groups, Ihara zeta functions and integrable dynamical systems

Coffee break

3:00 Y. Shalom (Tel Aviv Univ.): Measurable group theory

More info

Pierre. Pansu@math.u-psud.fr