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Logic Seminar

Wednesday, February 6, 2019
2:00pm to 3:00pm
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Linde Hall 255
Measures agreeing on invariant subsets
Forte Shinko, Department of Mathematics, Caltech,
Given a countable Borel equivalence relation on a standard Borel space X, when do two measures agree on the invariant sets? By a result of ├×├│risson, if G is a countable group generating the equivalence relation, then this property holds iff there exists a measure on G\times X whose pushforwards under the projection and the action are the original measures. We will investigate this and other equivalent formulations of this property.
For more information, please contact Mathematics Department by phone at 626-395-4335 or by email at [email protected].