School Seminars and Colloquia

The Steinberg torus

Tuesday Seminar

by Professor John Stembridge


Institution: University of Michigan, USA
Date: Tue 25th January 2011
Time: 1:00 PM
Location: Room 213, Richard Berry Building, The Univesity of Melbourne

Abstract: The Steinberg torus is a cell complex naturally associated to any affine Weyl group W. Although less well known than the Coxeter complex, it deserves equal billing in the affine Coxeter world.
Steinberg used it to give a slick proof of Bott's formula for the Poincare series of W, and it is closely linked to the cohomology of the associated Coxeter fan. In this talk we will discuss these applications as well as some recent joint work with K. Petersen and K. Dilks on the combinatorics of affine descents.

For More Information: contact: Mark Sorrell. email: msorrell@unimelb.edu.au