SMS scnews item created by John Enyang at Tue 28 Aug 2012 1515
Type: Seminar
Distribution: World
Expiry: 1 Sep 2012
Calendar1: 31 Aug 2012 1205-1255
CalLoc1: Carslaw 175
Auth: enyang@penyang.pc (assumed)

# Infinitesimal one-parameter subgroups and exponentiation

### Sobaje

###### Speaker:

Paul Sobaje (University of Melbourne)

###### Title:

Infinitesimal one-parameter subgroups and exponentiation

###### Abstract:

Let $$G$$ be a semisimple algebraic group over a field of characteristic $$p$$. In this talk, we will describe the varieties of infinitesimal one-parameter subgroups of $$G$$, and discuss their importance in representation theory. We will also consider a related question which deals with the existence of certain Springer isomorphisms between the nilpotent variety of $$\mathrm{Lie}(G)$$ and the unipotent variety of $$G$$.

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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.

John Enyang John.Enyang@sydney.edu.au

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