Max Dehn Seminar

on Geometry, Topology, Dynamics, and Groups

Fall 2018 as announced

Date Speaker Title click for abstract (if available)
October 4 10:45-11:45 in JWB 240
Daniel Studenmund
Notre Dame
Commensurability growth of nilpotent groups
A classical area of study in geometric group theory is subgroup growth, which counts the number of subgroups of a given group Gamma as a function their index. We will study a richer function, the commensurability growth, which is a function associated to a subgroup Gamma in an ambient group G. This talk covers the case that Gamma is an arithmetic subgroup of a unipotent group G, starting with the simplest example of the integers in the real line. This is joint work with Khalid Bou-Rabee.

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You may also be interested in the RTG Seminar
Max Dehn Seminar is organized by Mladen Bestvina, Ken Bromberg, Jon Chaika,
Donald Robertson, Domingo Toledo, and Kevin Wortman.

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