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School of Mathematics and Statistics
Algebra Group
Carslaw building
Algebraic Geometry Seminar
Algebra Seminar
Computational Algebra Seminar
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University of Sydney

School of Mathematics and Statistics

Algebraic Geometry Seminar

1.05pm - 2.30pm in Carslaw 709 on Thursday 16 August 2001
with a short break around 1.50

Anthony Henderson

A Personal Introduction to Perverse Sheaves
Part 2

In the second half of this introduction, I will talk about applicatons of perverse sheaves to characters of finite reductive groups (Lusztig's theory of character sheaves). In the case of GLn, we will see how to construct simple perverse sheaves whose characteristic functions are precisely the irreducible characters of GLn(Fq). A recurrent theme will be the notions of small and semismall maps.