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Journal of Lie Theory 28 (2018), No. 2, 381--426
Copyright Heldermann Verlag 2018

Représentations de Réduction Unipotente pour SO(2n+1), I: une Involution

Jean-Loup Waldspurger
IMJ-PRG CNRS, 4 place Jussieu, 75005 Paris, France

We consider a group SO(2n+1) over a p-adic field and tempered irreducible representations of this group, of unipotent reduction. We use the construction due to Lusztig of these representations. In an old paper with Moeglin, we have defined an involution in the complex vector space generated by those representations which are elliptic. It is strongly related to another involution defined by Lusztig for finite groups. We give a new definition of our involution and we prove it commutes, in some sense, with Jacquet functor.

Keywords: Representations of unipotent reduction, endoscopy.

MSC: 22E50

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