*Place : Rm111, RIMS, Kyoto University (different from as usual)

Abstract:
Amenability of a group action on a space is a classical concept introduced by Zimmer, which allows us to handle a non-amenable group action as an amenable group. Recently, amenability of C*-dynamics (i.e., non-commutative variant of the classical dynamical systems) is revisited and there is some drastic progress. I review some of them, notably characterizations, applications, and recipes to produce interesting examples. Partly a joint work with Narutaka Ozawa.

16:15 - Tea