Except otherwise indicated, the Seminar takes place on Tuesdays at 13:00 in Seminar Room C of the Mathematikon.
Schedule
09.06.2026
Speaker: Lael Costa (PSU)
Title: Dynamical Systems on Polygons
Time: 13:00.
Abstract:
In this talk, I will discuss several loosely related dynamical systems. In particular, I will speak about some variants of mathematical billiards and associated tilings and fractals. The talk will also explore a novel system which has ties to both billiards and the famous pentagram map. I will state and prove a few results, but much of the time will be dedicated to interactive software demonstrations. Audience participation will be encouraged!
26.05.2026
Speaker: Bram Bekker (TU Delft)
Title: Visualizing buildings
Time: 13:00.
Abstract:
Buildings are combinatorial and geometric objects invented to better understand the structure of matrix groups. The Buildings Gallery is a web application that shows several visualizations of these buildings, bringing to life a topic that has played an important role in geometric group theory since the 1960’s. We will explore some of the techniques behind these images, and discuss what parts of the group structure they help explain.
