[Binghamton Geometry Topology Seminar] Correct Title and Abstract

Cary Malkiewich malkiewich at math.binghamton.edu
Thu Oct 8 10:03:59 EDT 2020


Hi everyone,

A quick reminder that Kathryn (Katie) Mann from Cornell is speaking today,
and that the *coffee will be at 2pm*, at the seminar link, not 12:30pm at a
different link as usual.

Best,
Cary

On Tue, Oct 6, 2020 at 2:28 PM Matthew R Haulmark <haulmark at binghamton.edu>
wrote:

> Sorry, I didn't notice the beginning and the end of the abstract got
> clipped when I copied and pasted it didn't. Here you go.
>
> *Speaker*: Kathryn Mann (Cornell University)
> *Title*: Reconstructing maps out of groups
> *Abstract*: This talk is about the relationship between the algebraic
> structure of a discrete group and the possible dynamics of its actions.
> I'll explain a result with Maxime Wolff where we show that, under some
> circumstances, one can completely reconstruct a homeomorphism of a space
> out of algebraic (group structure) data.  As a consequence of this, we gave
> an independent short proof of a recent theorem of Kim and Koberda:  you can
> distinguish the group of $C^r$ diffeomorphisms of a 1-manifold from the
> group of $C^s$ diffeomorphisms just by knowing their finitely generated
> subgroups.
>
> Zoom link for coffee 2:00-2:50 pm and the seminar, 2:50 - 3:50 pm:
> https://binghamton.zoom.us/j/94057178271
>
> -Matt
> _______________________________________________
> Seminar web page:
> http://www2.math.binghamton.edu/p/seminars/topsem
> topsem mailing list:
> http://www1.math.binghamton.edu/mailman/listinfo/topsem
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