## Rigidity Theorems for Actions of Product Groups and Countable Borel Equivalence Relations

by
Greg Hjorth
,
Alexander S. Kechris

Citations: | 25 - 6 self |

### BibTeX

@MISC{Hjorth_rigiditytheorems,

author = {Greg Hjorth and Alexander S. Kechris},

title = {Rigidity Theorems for Actions of Product Groups and Countable Borel Equivalence Relations},

year = {}

}

### OpenURL

### Abstract

This paper is a contribution to the theory of countable Borel equivalence relations on standard Borel spaces. As usual, by a standard Borel space we mean a Polish (complete separable metric) space equipped with its #-algebra of Borel sets. An equivalence relation E on a standard Borel space X is Borel if it is a Borel subset of X². Given two