During the academic year 2016-2017, Romain Tessera and I organized the weekly seminar Groups, Actions and von Neumann algebras at the Université Paris-Sud, Orsay.
The seminar featured both research and introductory talks on topics including geometric and measured group theory, ergodic theory and von Neumann algebras.
Meetings
Monday October 10
Cyril Houdayer (Université Paris-Sud)
Character rigidity for higher rank lattices I (after Peterson)
Monday October 17
Amine Marrakchi (Université Paris-Sud)
Character rigidity for higher rank lattices II (after Peterson)
Monday November 7
Amaury Freslon (Université Paris-Sud)
Character rigidity for higher rank lattices III (after Peterson)
Monday November 14
Peter Verraedt (Université Paris-Sud)
Character rigidity for higher rank lattices IV (after Peterson)
Monday November 28
Cyril Houdayer (Université Paris-Sud)
On the type I conjecture for locally compact groups acting properly on trees
Monday December 5
Jean-Baptiste Boyer (Université Paris-Sud)
Perturbation of a Markov operator on the projective space
Monday December 12
Anna Sofie Krogager (KU Leuven)
Thin II1 factors with no Cartan subalgebras
Monday January 9
Jean Lécureux (Université Paris-Sud)
Nonlinearity for the groups of affine buildings of type Ã2
Monday January 30
Masato Mimura (Tohoku University and EPFL)
Synthesis of fixed points and trace class ideal
Monday February 13
Arielle Leitner (Technion)
Transitions of the diagonal Cartan subgroup in SL(n,R)
Monday February 20
Clément Toromanoff (Laboratoire Paul Painlevé)
Convergence groups and Specker compactifications
Monday May 29
Camille Horbez (CNRS and Université Paris-Sud)
Amenability at infinity of Out(Fn)
Monday June 26
Anne Lonjou (Institut de Mathématiques de Toulouse)
Cremona group and Voronoi paving