[Papers] [Alex Furman]

On Popa's Cocycle Superrigidity Theorem

These notes contain an Ergodic-theoretic account of the Cocycle Superrigidity Theorem recently discovered by Sorin Popa. We state and prove a relative version of the result, discuss some applications to measurable equivalence relations, and point out that Gaussian actions (of rigid'' groups) satisfy the assumptions of Popa's theorem.

Authors: A. Furman,
Bibliographical: Intern. Math. Res. Notices IMRN, {\bf 2007} (2007), 1--46, Art. ID rnm073.