Logic Seminar

Please note that the time is PST

In the probability measure preserving (p.m.p.) setup, a well-known consequence of Rokhlin's lemma is that any two aperiodic p.m.p. bijections are approximately conjugate, meaning that up to conjugacy, they only differ on sets of arbitrarily small measure. In the infinite measure-preserving (i.m.p.) setup, we will see why this is false and characterize approximate conjugacy for aperiodic i.m.p. bijections. This is joint work with Fabien Hoareau.