Séminaires : Phd Seminar - Séminaire des doctorant.e.s

Le séminaire des doctorant.e.s est l'occasion pour les doctorant.e.s de présenter des résultats et des problématiques dignes d'intérêt devant un public de non-spécialistes. L'ambiance y est informelle ; poser des questions naïves est encouragé, et les questions moins naïves sont bienvenues dans la mesure où elles n'entravent pas le bon déroulement de l'exposé.

Chaque jeudi à 18h, en alternance entre Jussieu et Sophie Germain.

The PhD seminar is an opportnuity for PhD students to present results and topics worthy of interest in front of a non-specialist audience. The mood is informal ; asking naive questions is highly encouraged and less naive questions are also welcomed, as long as they don't intefere with the smoothness of the talk.

Every Thursday at 6pm, alternating between Jussieu and Sophie Germain.

We apply an operator-algebraic property of finitely generated groups, called rapid decay (RD), to topological dynamics. The class of groups with RD includes the hyperbolic groups and cocompact lattices in SL3(R), among many other examples. We show that the compact, minimal G-spaces of an RD group G with amenable neighbourhood stabilizers have some rigidity properties; under general conditions, all such actions are topologically free. This is joint work with Nazmul Alam, Mehrdad Kalantar, and Randy Pham.