Series: Penn State Logic Seminar

Date: Tuesday, April 5, 2005

Time: 2:30 - 3:45 PM

Place: 103 Pond Laboratory

Speaker: John Clemens, Penn State, Mathematics

Title: Borel Reducibility of Coanalytic Equivalence Relations

Abstract:

   I shall consider coanalytic equivalence relations which are upper
   bounds for the class of Borel equivalence relations under the
   partial order of Borel reducibility. I will discuss several
   examples, including ones of intermediate degree and candidates for
   minimal such relations.