Geometry and Topology Seminar
Robbie Lyman (Rutgers University)
Geometries for groups
4:00PM, 122 Mathematics BuildingI want to introduce to you the space and poset of metric structures on a fixed topological group; this is an initially unusual formulation of the fundamental structures in geometric group theory, but I’m hoping that it will make some things click for you in the way it did for me. It’s well-suited to addressing questions such as “when does a group have a quasi-isometry type?” or “supposing a group has a quasi-isometry type, does it receive that type via an isometric action on a graph?” As an application, I’d also like to discuss joint work with Beth Branman, George Domat and Hannah Hoganson. In this work we use actions on graphs to compute the quasi-isometry type (and whether it exists) of the group of homeomorphisms of a space E, where E is required to be countable, compact Hausdorff and totally disconnected.
Algebra Seminar
Ankit Rai, UB
Perverse filtrations via Brylinski-Radontransformations
4:00PM, University at Buffalo Mathematics room 250
Analysis Seminar
Guo Chuan Thiang, Peking University
4:00PM, 250 Math Building