Basic Notions: Benjamin Weiss (HUJI) "Groups with property T have and "cost" of equivalence relations"

The cost of a measure-preserving equivalence relation is a quantitative measure of its complexity. I will explain what the cost is and then discuss a recent result of Tom Hutchcroft and Gabor Pete in which they construct, for any group with property T, a free ergodic measure preserving action with cost 1.

Date: 

Thu, 28/03/2019 - 16:00 to 17:15

Location: 

Ross 70