**On April 19th and 20th, Dr. Farb will visit our department**

**Topology, dynamics, and geometry of surfaces (and their remarkable relationships)**

**—Thursday, April 19th, 1:30pm-2:30pm****—**

**—Lockett 239****—**

**Light Lunch in Keisler Lounge at 1:00pm**

Surfaces can be considered from many different viewpoints: their shape (i.e. topological structure), their geometry (e.g. curvature), and the behavior of fluid flows on them. In this talk I will describe three beautiful theorems, one for each of these aspects of surfaces. I will also try to explain the remarkable fact that these seemingly completely different perspectives are intimately related. This walk will be geared towards undergraduates, or indeed anyone with some knowledge of multivariable calculus (although even that is not essential).

**The Mostow Rigidity Theorem: topology vs. algebra vs. geometry**

**—Friday, April 20th, 11:30am-12:30pm****—**

**—Lockett 239****—**

**Light Lunch in Keisler Lounge, 11:00am**

The Mostow Rigidity Theorem changed geometry and topology. This talk, aimed at graduate students, will attempt to explain how and why.

Upcoming Speakers!

Speakers for next year TBA

Past speakers and abstracts can be seen here.