PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Stephen Simpson, Jan Reimann.

Title:Combinatorial structure for analytic equivalence relations
Seminar:Logic Seminar
Speaker:John D. Clemens, University of North Texas
Abstract:
Orbit equivalence relations of Polish group actions form a proper subclass of the collection of analytic equivalence relations, and it is a long-standing problem to find a complete characterization of when an arbitrary equivalence relation is induced by some action of a Polish group. Such equivalence relations inherit combinatorial structure from the group actions inducing them, which can be used to analyze their complexity and other properties. In this talk I will discuss work in progress (joint with Su Gao) on generalizing some of the combinatorics of orbit equivalence relations to general analytic equivalence relations, and how a number of questions about the Borel reducibility hierarchy can be reformulated in this framework.

Room Reservation Information

Room Number:MB315
Date:03 / 17 / 2011
Time:01:00pm - 02:15pm