Motivic nature of character values of depth-zero representations

Details Motivic nature of character values of depth-zero representations Motivic nature of character values of depth-zero representations

2004-03-31

arxiv.org/abs/math/0403529v1

Mathematics

Representation Theory

Scientific paper

It is shown that the values of Harish-Chandra distribution characters on definable compact subsets of the set of topologically unipotent elements of symplectic or special orthogonal p-adic groups can be expressed as the trace of Frobenius action on virtual Chow motives. The result is restricted to a class of depth-zero representations that can be obtained by inflation from Deligne-Lusztig representations. The proof relies on arithmetic motivic integration.

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