##### Department of Mathematics,

University of California San Diego

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### Operator Algebras Seminar

## Daniel Drimbe

#### UCSD

## Cocycle superrigidity for coinduced actions

##### Abstract:

Popa's deformation/rigidity theory led to a remarkable cocycle superrigidity theorem for Bernoulli actions of groups with property (T) (2005) and of products of non-amenable groups (2006). More precisely, Popa obtained that every cocycle for such an action with values in a countable (and more generally, in a $\mathcal U_{fin}$) group is cohomologous with a group homomorphism. In this talk, we will present a generalization of this theorem to coinduced actions.

Host: Adrian Ioana

### November 17, 2015

### 10:00 AM

### AP&M 5402

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