Eisenstein Cohomology for GL<sub>N</sub> and the Special Values of Rankin–Selberg LFunctions (eBook)
by gunter harder, anantharam raghuram (Author)

 240 Pages
This book studies the interplay between the geometry and topology of locally symmetric spaces, and the arithmetic aspects of the special values of Lfunctions.
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 finitedimensional 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 sheaftheoretically 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 Lfunctions. 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 Lfunctions 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.
 Released: December 3, 2019
 Categories: Education
 Language: English
 Publisher: Princeton University Press
 ISBN10: 0691197938
 ISBN13: 9780691197937