Asymptotic representation theory over $\mathbb Z$

Members' Seminar
Topic:Asymptotic representation theory over $\mathbb Z$
Speaker:Thomas Church
Affiliation:Stanford University; Member, School of Mathematics
Date:Monday, November 28
Time/Room:1:15pm - 2:15pm/S-101
Video Link:https://video.ias.edu/membsem/2016/1128-ThomasChurch

Representation theory over $\mathbb Z$ is famously intractable, but "representation stability" provides a way to get around these difficulties, at least asymptotically, by enlarging our groups until they behave more like commutative rings. Moreover, it turns out that important questions in topology/number theory/representation theory/... correspond to asking whether familiar algebraic properties hold for these "rings". I'll explain how these connections work; describe what we know and don't know; and give a wide sampling of applications in different fields where this has led to concrete results. No knowledge of representation theory will be required---indeed, that's sort of the whole point!