Events - November 2020

Michael Brannan, Texas A&M University

"Quantum symmetries of graphs"

Lei Alice Chen, California Institute of Technology

"Actions of Homeo and Diffeo groups on manifolds"

In this talk, I discuss the general question of how to obstruct and construct group actions on manifolds. I will focus on large groups like Homeo(M) and Diff(M) about how they can act on another manifold N. The main result is an orbit classification theorem, which fully classifies possible orbits. I will also talk about some low dimensional applications and open questions. This is a joint work with Kathryn Mann.

Gigliola Staffilani, MIT

"The many faces of dispersive equations"

Seda Albayrak, Department of Pure Mathematics, University of Waterloo

"Sparse Automatic Sets"

I will present results in the theory of sparse automatic sets in three different contexts: the theory of algebraic power series, unlikely intersections, and the theory of representations in additive bases.

Online

Chris Sangwin, University of Edinburgh

"Assessing students' proofs online"

In this seminar I will describe how we, at the University of Edinburgh, have tried to help students learn proof through online assessment. This is ongoing work, driven by a practical need and constrained by current technology which cannot automatically assess students' free form proof. The seminar will discuss the nature of elementary proof more generally.