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arxiv: 1303.5795 · v1 · pith:Z2ZKIAIBnew · submitted 2013-03-22 · 🧮 math.RT

Geometric realization of special cases of local Langlands and Jacquet-Langlands correspondences

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keywords representationirreduciblelocalcorrespondencecorrespondsgeometricgroupjacquet-langlands
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Let F be a non-Archimedean local field and let E be an unramified extension of F of degree n>1. To each sufficiently generic multiplicative character of E (the details are explained in the body of the paper) one can associate an irreducible n-dimensional representation of the Weil group W_F of F, which corresponds to an irreducible supercuspidal representation \pi\ of GL_n(F) via the local Langlands correspondence. In turn, via the Jacquet-Langlands correspondence, \pi\ corresponds to an irreducible representation \rho\ of the multiplicative group of the central division algebra over F with invariant 1/n. In this note we give a new geometric construction of the representations \pi\ and \rho, which is simpler than the existing algebraic approaches (in particular, the use of the Weil representation over finite fields is eliminated).

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