Seminar series
Date
Thu, 22 Oct 2020
Time
15:30 -
16:15
Location
Virtual
Speaker
Lauren Ruth
Organisation
Mercy College
We have various ways of describing the extent to which two countably infinite groups are "the same." Are they isomorphic? If not, are they commensurable? Measure equivalent? Quasi-isometric? Orbit equivalent? W*-equivalent? Von Neumann equivalent? In this expository talk, we will define these notions of equivalence, discuss the known relationships between them, and work out some examples. Along the way, we will describe recent joint work with Ishan Ishan and Jesse Peterson.
Further Information
Part of UK virtual operator algebras seminar: https://sites.google.com/view/uk-operator-algebras-seminar/home