Greg Hjorth: Yet another proof of Gaboriau-Popa

Week 2, Friday June 26, 16:30-17:20

Damien Gaboriau and Sorin Popa showed that the free group has uncountably many free, measure preserving, ergodic actions up to orbit equivalence. I will give a proof which, unlike the earlier proofs of this result, does not use property (T).