**SMS scnews item created by John Enyang at Wed 29 Feb 2012 0957**

Type: Seminar

Distribution: World

Expiry: 4 Mar 2012

**Calendar1: 2 Mar 2012 1205-1255**

**CalLoc1: Carslaw 175**

CalTitle1: Algebra Seminar: Bédard -- Tight objects in Lie Theory

Auth: enyang(.pmstaff;2044.2002)@penyang.pc.maths.usyd.edu.au

### Algebra Seminar

# Tight objects in Lie Theory

### Robert Bédard (UQAM)

#### Friday March 2, 12:05--12:55pm, Carslaw 175

#### Abstract

G.Lusztig constructed a basis of the negative part of a quantized enveloping algebra. This canonical basis has nice properties. Tight monomials are the simplest elements of this basis. I will first describe the notion of tight monomials in the context of quantized enveloping algebras. Then there is a similar situation in the context of perverse sheaves arising from graded Lie algebras that could be seen as a generalization. This will also be considered in the talk.

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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