Monday, April 26, 2021
12:00 PM -
1:00 PM
Online Event
Logic Seminar
Series: Logic Seminar Series
A dichotomy for countable unions of smooth Borel equivalence relations
I will present a dichotomy for equivalence relations on Polish spaces that can be expressed as countable unions of smooth Borel subequivalence relations. It can be seen as an extension of Kechris-Louveau's dichotomy for hypersmooth Borel equivalence relations. A generalization of our dichotomy, for equivalence relations that can be expressed as countable unions of Borel equivalence relations belonging to certain fixed classes, will also be presented. This is a joint work with Benjamin Miller.
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For more information, please email A. Kechris at [email protected].