# Meeting Details

Title: Topological and metric rigidity for actions of nonabelian groups Geometry Luncheon Seminar Jean-Francois Quint, Paris In this talk, I will present some recent results on the subject above, part of which are jointly due to Yves Benoist and myself. For example, if $\Gamma$ is a non virtually solvable subgroup of $SL(2,\mathbb Z)$ (resp. $SL(2,\mathbb R)$), every $\Gamma$-orbit in $\mathbb T^2$ (resp. $SL(2,\mathbb R)/SL(2,\mathbb Z)$) is finite or dense.