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Lifting of characters on p-adic orthogonal and metaplectic groups

Part of:Lie groups

Published online by Cambridge University Press:  18 March 2010

Tatiana K. Howard
Tatiana K. Howard*
Affiliation:
Mathematics Department, University of Michigan, Ann Arbor, MI 48109, USA (email: tkhoward@umich.edu)
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Abstract

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Let F be a p-adic field. Consider a dual pair $({\rm SO}(2n+1)_+, \widetilde {{\rm Sp}}(2n)),$ where SO(2n+1)+ is the split orthogonal group and $\widetilde {{\rm Sp}}(2n)$ is the metaplectic cover of the symplectic group Sp(2n) over F. We study lifting of characters between orthogonal and metaplectic groups. We say that a representation of SO(2n+1)+ lifts to a representation of $\widetilde {{\rm Sp}}(2n)$ if their characters on corresponding conjugacy classes are equal up to a transfer factor. We study properties of this transfer factor, which is essentially the character of the difference of the two halves of the oscillator representation. We show that the lifting commutes with parabolic induction. These results were motivated by the paper ‘Lifting of characters on orthogonal and metaplectic groups’ by Adams who considered the case F=ℝ.

Keywords

lifting of characterstransfer factoroscillator representationparabolic induction

MSC classification

Secondary:22E50: Representations of Lie and linear algebraic groups over local fields

Information

Type
Research Article
Information
Compositio Mathematica , Volume 146 , Issue 3 , May 2010, pp. 795 - 810
Copyright
Copyright © Foundation Compositio Mathematica 2010

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