Tempered modules in exotic Deligne-Langlands correspondence

Details Tempered modules in exotic Deligne-Langlands correspondence Tempered modules in exotic Deligne-Langlands correspondence

2009-01-25

arxiv.org/abs/0901.3918v4

Mathematics

Representation Theory

51 pages

Scientific paper

The main purpose of this paper is to identify the tempered modules for the affine Hecke algebra of type $C_n^{(1)}$ with arbitrary, non-root of unity, unequal parameters, in the exotic Deligne-Langlands correspondence in the sense of Kato. Our classification has several applications to the Weyl group module structure of the tempered Hecke algebra modules. In particular, we provide a geometric and a combinatorial classification of discrete series which contain the sign representation of the Weyl group. This last combinatorial classification was expected from the work of Heckman-Opdam and Slooten.

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