**SMS scnews item created by James East at Mon 15 Jun 2009 1148**

Type: Seminar

Distribution: World

Expiry: 19 Jun 2009

**Calendar1: 19 Jun 2009 1205-1255**

**CalLoc1: Carslaw 375**

Auth: jamese@bari.maths.usyd.edu.au

### Algebra Seminar

# Random walks on affine buildings and representations of affine Hecke algebras

### James Parkinson

#### Friday June 19, 12:05--12:55pm, Carslaw 375

###### Abstract

In this talk we discuss an approach for analysing random walks on p-adic Lie groups (groups like the group SL_3(Q_p) of 3x3 matrices with entries in the p-adics and with determinant 1). The types of walks that we are interested in are those that are well adapted to the structure of the affine building associated to the group: Namely those walks which induce radially invariant random walks on the chambers of the building.

The aim of the talk is to give an overview of the types of techniques used. The main idea is to use the representation theory of the associated affine Hecke algebra, and some harmonic analysis from the work of E. Opdam. This is very much a work in progress, in collaboration with Bruno Schapira from Paris Sud.

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After the seminar we will take the speaker to lunch.

See the Algebra Seminar web page for information about other seminars in the series.

James East jamese@maths.usyd.edu.au