Cocycle superrigidity for coinduced actions
Operator Algebras
2015-12-02 v1 Dynamical Systems
Abstract
We prove a cocycle superrigidity theorem for a large class of coinduced actions. In particular, if is a subgroup of a countable group , we consider a probability measure preserving action and let be the coinduced action. Assume either that has property (T) or that is amenable and is a product of non-amenable groups. Using Popa's deformation/rigidity theory we prove is -cocycle superrigid, that is any cocycle for this action to a (e.g. countable) group is cohomologous to a homomorphism from to
Keywords
Cite
@article{arxiv.1512.00093,
title = {Cocycle superrigidity for coinduced actions},
author = {Daniel Drimbe},
journal= {arXiv preprint arXiv:1512.00093},
year = {2015}
}