| Date: | February 3, 2020 |
| Time: | 3:00pm |
| Location: | BLOC 111 |
| Speaker: | Cosmas Kravaris |
| Title: | On the Finiteness of the Cone Types of finitely generated Abelian Groups |
| Abstract: | In 1980, Cannon defined the notion of a Cone Type for Cayley graphs of finitely generated groups and used it to show that hyperbolic groups have rational growth series. It is an open question which groups have finitely many cone types. In my talk, I will show that the Cayley graph of a finitely generated Abelian Group has finitely many cone types for any generating set. |
|
| Date: | February 17, 2020 |
| Time: | 3:00pm |
| Location: | BLOC 111 |
| Speaker: | Arman Darbinyan |
| Title: | Lacunary hyperbolicity and algorithmic problems in groups |
| Abstract: | Lacunary hyperbolicity was introduced by Osin, Olshanskii and
Sapir as a natural generalization of hyperbolicity from the class of
finitely presented groups to the class of finitely generated groups. I
will discuss the concept of lacunary hyperbolicity and opulent behavior
of classical group theoretical algorithmic problems in that class. |
|
| Date: | February 24, 2020 |
| Time: | 3:00pm |
| Location: | BLOC 111 |
| Speaker: | Konrad Wrobel |
| Title: | Coamenable Inclusions of Inner Amenable Groupoids |
| Abstract: | Coamenability of groups has been extensively studied since the
60's. We define coamenability of an inclusion of measured groupoids and
show inner amenability is preserved under such inclusions. |
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