Study of antiorbital complexes

Details Study of antiorbital complexes Study of antiorbital complexes

2009-10-21

arxiv.org/abs/0910.4147v2

Mathematics

Representation Theory

32 pages

Scientific paper

Let E be a finite dimensional vector space over an algebraic closure of a finite field with a given linear action of a connected linear algebraic group K and let E' be the dual space. A complex of l-adic sheaves on E is said to be orbital if it is a simple perverse sheaf whose support is a single K-orbit. A complex of l-adic sheaves on E is said to be biorbital if it is orbital and if its Deligne Fourier transform is orbital on E'. In this paper we study examples of biorbital complexes arising in the case where E is an eigenspace of a semisimple automorphism of a reductive Lie algebra.

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