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L-functions of symmetric powers of cubic exponential sums

  • C. Douglas Haessig
Veröffentlicht/Copyright: 31. März 2009
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Journal für die reine und angewandte Mathematik
Aus der Zeitschrift Band 2009 Heft 631

Abstract

For each positive integer k, we investigate the L-function attached to the k-th symmetric power of the F-crystal associated to the family of cubic exponential sums of x3 + λx where λ runs over . We explore its rationality, field of definition, degree, trivial factors, functional equation, and Newton polygon. The paper is essentially self-contained, due to the remarkable and attractive nature of Dwork's p-adic theory.

A novel feature of this paper is an extension of Dwork's effective decomposition theory when k < p. This allows for explicit computations in the associated p-adic cohomology. In particular, the action of Frobenius on the (primitive) cohomology spaces may be explicitly studied.

Received: 2007-08-28
Revised: 2008-01-09
Published Online: 2009-03-31
Published in Print: 2009-June

© Walter de Gruyter Berlin · New York 2009

Heruntergeladen am 26.9.2025 von https://www.degruyterbrill.com/document/doi/10.1515/CRELLE.2009.040/html
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