Thursday, March 8, 2018, from 4 to 5:30pm
East Hall, room 3088
Speaker: Dana Bartosova (Carnegie Mellon University)
Title: Ellis’ problem for automorphism groups
Ellis’ problem is a problem from topological dynamics asking whether two well studied flows are canonically isomorphic. In the case of groups of automorphisms of discrete structures, we can translate this problem into a question about Boolean algebras and solve the problem for some countable structures. We also arrive at questions about existence of certain ultrafilters. This is a join work with Andy Zucker.