[Binghamton Geometry Topology Seminar] Seminar This Week

[Cary Malkiewich]

Hi everyone,

A quick reminder about the seminar and social hour today. See you there!

Cary

On Mon, Apr 19, 2021, 1:29 PM Matthew R Haulmark <haulmark at binghamton.edu>
wrote:

> Hi everyone,
>
> This week our speaker will be Emily Stark from Wesleyan University. Here
> are the details.
>
> *Title*: Action Rigidity for Graphs of Manifold Groups
>
>
> *Abstract*: The relationship between the large-scale geometry of a group
> and its algebraic structure can be studied via three notions: a group's
> quasi-isometry class, a group's abstract commensurability class, and
> geometric actions on proper geodesic metric spaces. A common model geometry
> for groups G and G' is a proper geodesic metric space on which G and G' act
> geometrically.
>
>
> A group G is action rigid if every group G' that has a common model
> geometry with G is abstractly commensurable to G. For example, a closed
> hyperbolic n-manifold group is not action rigid for all n at least three.
> In contrast, we prove certain graphs of manifold groups are action rigid.
> Consequently, we obtain examples of quasi-isometric groups that do not
> virtually have a common model geometry. This is joint work with Alex
> Margolis, Sam Shepherd, and Daniel Woodhouse.
>
>
> Zoom link for the seminar, 2:50 - 3:50:
> https://binghamton.zoom.us/j/94057178271
>
> Zoom link for the coffee, 12:30 - 1:30:
> https://binghamton.zoom.us/j/96674397432
>
> Best,
>
> Matt
> _______________________________________________
> Seminar web page:
> http://www2.math.binghamton.edu/p/seminars/topsem
> topsem mailing list:
> http://www1.math.binghamton.edu/mailman/listinfo/topsem
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www1.math.binghamton.edu/pipermail/topsem/attachments/20210422/29d60999/attachment.html>