### Monday January 30, 2006, 4:00 PM

### tea at
3:40 PM at the Math Department lounge (Goldsmith 300)

**Speaker**: Ruth Charney

**Title**: Introduction to Coxeter Groups

**Abstract**: Coxeter groups appear in many areas of mathematics and
form the basis for the theory of buildings (which will be the focus
of the topology seminar this term). Coxeter groups can be defined
geometrically or algebraically. I will give both definitions and
lots of examples, and I will discuss the connection between the
algebra and the geometry. No prior knowledge of Coxeter groups will
be assumed.