The Geometry and Cohomology of Some Simple Shimura Varieties. (AM-151)

The Geometry and Cohomology of Some Simple Shimura Varieties. (AM-151)
Author :
Publisher : Princeton University Press
Total Pages : 287
Release :
ISBN-10 : 9780691090924
ISBN-13 : 0691090920
Rating : 4/5 (24 Downloads)

Book Synopsis The Geometry and Cohomology of Some Simple Shimura Varieties. (AM-151) by : Michael Harris

Download or read book The Geometry and Cohomology of Some Simple Shimura Varieties. (AM-151) written by Michael Harris and published by Princeton University Press. This book was released on 2001-11-04 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims first to prove the local Langlands conjecture for GLn over a p-adic field and, second, to identify the action of the decomposition group at a prime of bad reduction on the l-adic cohomology of the "simple" Shimura varieties. These two problems go hand in hand. The results represent a major advance in algebraic number theory, finally proving the conjecture first proposed in Langlands's 1969 Washington lecture as a non-abelian generalization of local class field theory. The local Langlands conjecture for GLn(K), where K is a p-adic field, asserts the existence of a correspondence, with certain formal properties, relating n-dimensional representations of the Galois group of K with the representation theory of the locally compact group GLn(K). This book constructs a candidate for such a local Langlands correspondence on the vanishing cycles attached to the bad reduction over the integer ring of K of a certain family of Shimura varieties. And it proves that this is roughly compatible with the global Galois correspondence realized on the cohomology of the same Shimura varieties. The local Langlands conjecture is obtained as a corollary. Certain techniques developed in this book should extend to more general Shimura varieties, providing new instances of the local Langlands conjecture. Moreover, the geometry of the special fibers is strictly analogous to that of Shimura curves and can be expected to have applications to a variety of questions in number theory.


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