**Date & Time:** Thursday, September 11, 2008, 15:00-16:30.

Tuesday, September 16, 2008, 11.30-12.30.

**Venue:** Ramanujan Hall

**Title:** Introduction to Boltzmann Equation

**Speaker:** R. Alexandre, Universit'e d'Evry Val d'Essonne

**Abstract:** I will present the basic facts on this equation, recall the physics and the mathematical difficulties. I will recall the results of Diperna-Lions, and others on this equation in the cut-off case. In the last part of the second talk, I will also talk about the non cut-off case and try to show the main difficulties in this case. Open problems in this area will be presented.