Geometry and Topology Seminar [Department of Mathematics and Statistics, Binghamton University]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
=====Geometry and Topology Seminar=====

We meet **Thursdays** at **2:45--3:45 pm** in **Whitney Hall 100E**. This semester's organizers are James Hyde and Lorenzo Ruffoni. The seminar has an announcement [[https://groups.google.com/a/binghamton.edu/g/topsem|mailing list]] open to all.

Topics include: geometric group theory, differential geometry and topology, low-dimensional topology, algebraic topology, and homotopy theory. 


-----

=====Fall 2026=====
 
  * **8/20/2026** \\ Speaker: ** Yu-Chan Chang (Ohio State) ** \\ Title: **Dehn Functions of Bestvina--Brady Groups** <WRAP box> //Abstract:// Dehn functions are quasi-isometry invariants of finitely presented groups that measure the complexity of the word problem and capture geometric properties of groups. For example, hyperbolic groups are characterized by having linear Dehn function. Subgroups can have larger Dehn functions than their ambient groups. For instance, CAT(0) groups have at most quadratic Dehn function, but their subgroups can have polynomial Dehn functions of arbitrary degree. In this talk, I will review some results on Dehn functions and then present a complete classification of the Dehn functions of Bestvina--Brady groups. This is joint work with Jeronimo Garcia-Mejia and Matteo Migliorini.  \\ </WRAP>

  * **10/15/2026** \\ no seminar (Fall break) \\ 

  * **10/22/2026** \\ Speaker: ** Meenakshy Jyothis (University of Oklahoma) ** \\ Title: **TBA** <WRAP box>// Abstract: // 
TBA\\ </WRAP>

  * **11/26/2026** \\ no seminar (Thanksgiving) \\ 


-----

=====Past Semesters=====

[[seminars:topsem:topsem_spring2026|Spring 2026]] | [[seminars:topsem:topsem_fall2025|Fall 2025]] | [[seminars:topsem:topsem_spring2025|Spring 2025]] | [[seminars:topsem:topsem_fall2024|Fall 2024]] | [[seminars:topsem:topsem_spring2024|Spring 2024]] | [[seminars:topsem:topsem_fall2023|Fall 2023]] | [[seminars:topsem:topsem_spring2023|Spring 2023]] | [[seminars:topsem:topsem_fall2022|Fall 2022]] | [[seminars:topsem:topsem_spring2022|Spring 2022]] | [[seminars:topsem:topsem_fall2021|Fall 2021]] | [[seminars:topsem:topsem_spring2021|Spring 2021]] | [[seminars:topsem:topsem_fall2020|Fall 2020]] | [[seminars:topsem:topsem_spring2020|Spring 2020]] | [[seminars:topsem:topsem_fall2019|Fall 2019]] | [[seminars:topsem:topsem_spring2019|Spring 2019]] | [[seminars:topsem:topsem_fall2018|Fall 2018]] | [[seminars:topsem:topsem_spring2018|Spring 2018]] | [[seminars:topsem:topsem_fall2017|Fall 2017]] | [[seminars:topsem:topsem_spring2017|Spring 2017]] | [[seminars:topsem:topsem_f16|Fall 2016]] | [[seminars:topsem:topsem_s16|Spring-Summer 2016]] | [[seminars:topsem:topsem_f15|Fall 2015]] | [[seminars:topsem:topsem_s15|Spring 2015]] | [[seminars:topsem:topsem_f14|Fall 2014]]