Séminaire de théorie des groupes à l’ENS

https://sites.google.com/site/annaerschler/programtalks

14.00-14.45 François Ledrappier (Paris VI), Differentiability of the linear drift in negative curvature15.00-15.45 Johannes Cuno (ENS), Random walks on Baumslag-Solitar groups15.45-16.15 pause café16.15-17.00 Ariel Yadin (Ben Gurion University), Intersectional IRS and Furstenberg entropy realization

14.00-14.45 Julien Cassaigne (IML, Marseille): A family of infinite words with complexity 2n+1 associated with a bidimensional continued fraction algorithm15.00-15.45 Milton Minervino (LaBRI, Bordeaux): Fractals de Rauzy et substitutions d'arbre15.45-16.15 coffee break16.45-17.00 Nathalie Aubrun (ENS, Lyon): Tilings problems on substitution orbits

14.00-14.45 Omer Tamuz (Caltech): The Poisson boundary and the infinite conjugacy class property15.00-15.45 Yair Hartman (Northwestern University): Stationary C*-Dynamical Systems15.45-16.15 pause café16.15-17.00 Said Sidki (University of Brasilia): Self-similarity and finite presentability

14.00-14.45 Thomas Schick (Göttingen): Approximation of L2-Betti numbers and the algebraic Eigenvalue property (after Jaikin-Zaipirain)15.00-15.45 Jacques Darné (Lille): Variations autour du problème d'Andreadakis 15.45-16.15 pause café16.15-17.00 Volodymyr Nekrashevych (Texas A&M): Amenability of iterated monodromy groups

14.00-14.45 Pierre Pansu (Orsay) L^1 cohomology of Euclidean spaces andHeisenberg groups15.00-15.45  Tianyi Zhang  (UC San Diego) Growth of torsion Grigorchukgroups15.45-16.15 pause café16.15-17.00  Sergei Ivanov (St-Petersbourg), Transfinite invariants ofgroups and spaces17.15-18.00 Kate Juschenko (Northwestern University), On Liouvilleproperty of action of discrete groups

14.00-14.45 Martin Bridson (Oxford), Profinite rigidity and hyperbolic 3-orbifolds15.00-15.45 Arnaud Hilion (Marseille): Boundary of cyclic hyperbolic extensions of free groups15.45-16.15 pause café16.15-17.00 Damien Gaboriau (ENS Lyon), On non-vanishing of the cohomology of Aut(Fn) and Out(Fn) in top dimensions

Tuesday, 13 November14.00-14.45 Miklos Abert (Renyi Institute Budapest)15.00-15.45 Arman Darbinyan (ENS Paris)15.45-15.15 coffee break16.15-17.00 Rachel Skipper (Göttingen and ENS Lyon)

14.00-14.45 Dawid Kielak (Bielefeld)Fibring of residually finite rationally-solvable groups14.45 -15.15 coffee break15.15-16.00 Damian Osajda (Wroclaw and McGill, Montreal)A combination theorem for combinatorially non-positively curved complxes of hyperbolic groups

Tuesday, 22 January14.00-14.45 Bertrand Rémy (Ecole Polytechnique)15.00-15.45 Tom Hutchcroft (Cambridge)15.45-16.15 coffee break16.15-17.00 Pavel Zalesski (University of Brasilia)Bertrand Remy, Quasi-isometric invariance of continuous group Lp-cohomology, and first applications to vanishings (joint with Marc Bourdon)We show that the continuous L^p-cohomology of locally compact second countable groups is a quasi-isometric invariant. As an application, we prove partial results supporting a positive answer to a question asked by M. Gromov, suggesting a classical behaviour of continuous L^p-cohomology of simple real Lie groups. In addition to quasi-isometric invariance, the ingredients are a spectral sequence argument […]

14.00-14.45 Joshua Frisch (Caltech) Proximal actions, Strong amenability, and Infinite conjugacy class groups15.00-15.45 Andy Zucker (Paris VII) Bernoulli Disjointness15.45-16.15 coffee break16.15-17.00 Christophe Garban (Université Lyon 1) Inverted orbits of exclusion processes, diffuse-extensive-amenability and (non-?)amenability of the interval exchanges

14.00-14.45 Emmanuel Militon (Nice), Groups of diffeomorphisms of a Cantor set15.00-15.45 Simon André (Rennes), Hyperbolicity is preserved under elementary equivalence15.45-16.15 coffee break(CANCELED) 16.15-17.00 Nikolay Nikolov (Oxford), On conjugacy classes in compact groups