Extended quotients in the principal series of reductive p-adic groups

Details Extended quotients in the principal series of reductive p-adic groups Extended quotients in the principal series of reductive p-adic groups

2011-10-30

arxiv.org/abs/1110.6596v1

Mathematics

Representation Theory

32 pages

Scientific paper

The geometric conjecture developed by the authors in [1,2,3,4] applies to the smooth dual Irr(G) of any reductive p-adic group G. It predicts a definite geometric structure - the structure of an extended quotient - for each component in the Bernstein decomposition of Irr(G). In this article, we prove the geometric conjecture for the principal series in any split connected reductive p-adic group G. The proof proceeds via Springer parameters and Langlands parameters. As a consequence of this approach, we establish strong links with the local Langlands correspondence. One important feature of our approach is the emphasis on two-sided cells in extended affine Weyl groups.

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