Titles and Abstracts
Michelle Chu

Annette Karrer
Contracting boundaries of rightangled Coxeter groups
A complete CAT(0) space has a topological space associated to it called the contracting or Morse boundary. This boundary captures how similar the CAT(0) space is to a hyperbolic space. CharneySultan proved this boundary is a quasiisometry invariant, i.e. it can be defined for CAT(0) groups. Interesting examples arise among contracting boundaries of rightanlged Coxeter groups.
The talk will consist of two parts. The main part will be about my PhD project. We will study the question of how the contracting boundary of a rightangled Coxeter group changes when we glue certain graphs on its defining graph. We will focus on the question of when the resulting graph corresponds to a rightangled Coxeter group with totally disconnected contracting boundary. Afterward, we will discuss surprising circles in contracting boundaries of certain RACGs. The latter is joint work with Marius Graeber, Nir Lazarovich, and Emily Stark.

Mireille Soergel
Dyer groups
One common feature of Coxeter groups and rightangled Artin groups is their solution to the word problem. In his study of reflection subgroups of Coxeter groups, Dyer introduces a family of groups, Dyer groups, which also have the same solution to the word problem as Coxeter groups. I will introduce this family of groups, give some of their properties

Yuri Santos Rego
Exploring the Coxeter galaxy
In this talk we will pull out our telescopes to have a look at the galaxy of Coxeter groups, which is a portion of the universe of finitely presented groups encoding Coxeter groups up to isomorphism. We shall discuss tools to chart the Coxeter galaxy and discuss the parts that humankind has explored so far.