20 October 2011
11:00
Jamshid Derakhshan
Abstract

This is joint work with Uri Onn. We use motivic integration to get the growth rate of the sequence consisting of the number of conjugacy classes in quotients of G(O) by congruence subgroups, where $G$ is suitable algebraic group over the rationals and $O$ the ring of integers of a number field.

The proof uses tools from the work of Nir Avni on representation growth of arithmetic groups and results of Cluckers and Loeser on motivic rationality and motivic specialization.

26 May 2011
11:00
B.Zilber
Abstract
12 May 2011
11:00
B.Zilber
Abstract
5 May 2011
12:00
Lee Butler
Abstract
10 March 2011
11:00
L.Shaheen
Abstract

An S-act over a monoid S is a representation of a monoid by tranformations of a set, analogous to the notion of a G-act over a group G being a representation of G by bijections of a set. An S-poset is the corresponding notion for an ordered monoid S.

3 March 2011
11:00
Abstract
17 February 2011
11:00
Bernhard Elsner
Abstract