Lifting of characters on p-adic orthogonal and metaplectic groups

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Abstract

Let F be a p-adic field. Consider a dual pair (SO}(2n+1)+, Sp(2n)), where SO(2n+1)+ is the split orthogonal group and 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 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 Liftingof characters on orthogonal and metaplectic groups by Adams who considered the caseF=.

Original languageEnglish (US)
Pages (from-to)795-810
Number of pages16
JournalCompositio Mathematica
Volume146
Issue number3
DOIs
StatePublished - May 1 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Algebra and Number Theory

Keywords

  • lifting of characters
  • oscillator representation
  • parabolic induction
  • transfer factor

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