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Local (semi-)rigidity for boundary actions
Speaker: Chris Connell


Some generalities about group representations by isometries on the complex hyperbolic space of infinite dimensions will be introduced. For this purpose the functions of hyperbolic type, which play a role analogous to that of positive type functions with respect to unitary representations, will be discussed.

In particular the case of SL_2 will be treated in detail. A new family of representations will be described as well as the questions it raises about the structure of the set of hyperbolic type functions defined on a given group.

Date : Fri, Nov 11

Time: 14:00

Place: SR 10