Article contents
Approximate equivalence of group actions
Published online by Cambridge University Press: 24 January 2017
Abstract
We consider several weaker versions of the notion of conjugacy and orbit equivalence of measure preserving actions of countable groups on probability spaces, involving equivalence of the ultrapower actions and asymptotic intertwining conditions. We compare them with the other existing equivalence relations between group actions, and study the usual type of rigidity questions around these new concepts (superrigidity, calculation of invariants, etc).
- Type
- Original Article
- Information
- Copyright
- © Cambridge University Press, 2017
References
- 6
- Cited by