Martino Lupini: The descriptive set theory of Polish groupoids

13/December/2013,  13:30–15:00

Fields institute, Room 210

Speaker: Martino Lupini

Talk Title: The descriptive set theory of Polish groupoids

Abstract: I will present an overview of functorial classification within the framework of invariant descriptive set theory, based on the notion of Polish groupoid and Borel classifying functor. I will then explain how several results about Polish group actions admit natural generalizations to Polish groupoids, extending works of Becker-Kechris, Effros, Hjorth, and Ramsay.

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