Orbit Equivalence and actions of F_n

Abstract

In this paper we show that there are "E_0 many" orbit inequivalent free actions of the free groups F_n, $2\le n\le \infty$, by measure preserving transformations on a standard Borel probability space. In particular, there are uncountably many such actions.

This paper appeared in the Journal of Symbolic Logic, see reference below. (Nov. 29: Title of paper corrected.)

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