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    Eisenstein Cohomology for GLN and the Special Values of Rankin–Selberg L-Functions
    Eisenstein Cohomology for GLN and the Special Values of Rankin–Selberg L-Functions
    Eisenstein Cohomology for GLN and the Special Values of Rankin–Selberg L-Functions
    Ebook234 pages5 hours

    Eisenstein Cohomology for GLN and the Special Values of Rankin–Selberg L-Functions

    By Günter Harder and Anantharam Raghuram

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    About this ebook

    This book studies the interplay between the geometry and topology of locally symmetric spaces, and the arithmetic aspects of the special values of L-functions.

    The authors study the cohomology of locally symmetric spaces for GL(N) where the cohomology groups are with coefficients in a local system attached to a finite-dimensional algebraic representation of GL(N). The image of the global cohomology in the cohomology of the Borel–Serre boundary is called Eisenstein cohomology, since at a transcendental level the cohomology classes may be described in terms of Eisenstein series and induced representations. However, because the groups are sheaf-theoretically defined, one can control their rationality and even integrality properties. A celebrated theorem by Langlands describes the constant term of an Eisenstein series in terms of automorphic L-functions. A cohomological interpretation of this theorem in terms of maps in Eisenstein cohomology allows the authors to study the rationality properties of the special values of Rankin–Selberg L-functions for GL(n) x GL(m), where n + m = N. The authors carry through the entire program with an eye toward generalizations.

    This book should be of interest to advanced graduate students and researchers interested in number theory, automorphic forms, representation theory, and the cohomology of arithmetic groups.

    LanguageEnglish
    PublisherPrinceton University Press
    Release dateDec 3, 2019
    ISBN9780691197937
    Eisenstein Cohomology for GLN and the Special Values of Rankin–Selberg L-Functions

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