[Binghamton Geometry Topology Seminar] Geometry and Topology seminar: Yash Lodha

[Cary Malkiewich]

Hi everyone,

Our speaker has noted that many of us saw the talk given in the
announcement yesterday, so he's giving a new talk today on his more recent
work. Updated title and abstract below! See you there or at the link

https://binghamton.zoom.us/j/94800072611

Cary

=========================================
Second bounded cohomology, left orderability and a question of Navas.
Abstract: In this talk I will describe some new results around the second
bounded cohomology of various finitely generated and finitely presented
groups acting on the line.
This leads to the solution (in the negative) of the following question of
Navas: Does the vanishing of second bounded cohomology (with trivial real
coefficients) imply indicability of a finitely generated left orderable
group? This is joint work with Fournier-Facio.



On Wed, May 4, 2022 at 5:33 PM Cary Malkiewich <
malkiewich at math.binghamton.edu> wrote:

> Hi everyone,
>
> This week we are pleased to have Yash Lodha (Vienna) speaking about left
> orderable groups, title and abstract below. As usual, the talk will be on
> Thursday at 2:50pm in WH 100E.
>
> The speaker will be delivering the talk remotely, and we'll project it in
> WH 100E. In case you can't make it and would like to join remotely, you can
> join at the link:
>
> https://binghamton.zoom.us/j/94800072611
>
> Some of us will meet at 12pm outside WH100E to get lunch, anyone is
> welcome to join!
>
> Best,
> Cary
>
> =========================================
> Title: Some new constructions in the theory of left orderable groups
> Abstract: I will define two new constructions of finitely generated simple
> left orderable groups (in recent joint work with Hyde and Rivas). Among
> these examples are the first examples of finitely generated simple left
> orderable groups that admit a minimal action by homeomorphisms on the
> Torus, and the first family that admits such an action on the circle. I
> shall also present examples of finitely generated simple left orderable
> groups that are uniformly simple (these were constructed by me with Hyde in
> 2019). And present new examples that, somewhat surprisingly, have infinite
> commutator width. Finally, I will present some new results around the
> second bounded cohomology of these groups (joint with Fournier-Facio)
>
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