**Date & Time:** Thursday, September 24, 2015, 15:00-17:00.

**Venue:** Room 216

**Title:** Semisimple groups of rank one

**Speaker:** Shripad Garge, IIT Bombay

**Abstract:** After having proved that the Weyl group of a connected linear
algebraic group is generated by reflections, we now study the semisimple
groups of rank one. The main theorem here is that such a group is either
SL_2 or PSL_2.