On localizations of the characteristic classes of l-adic sheaves and conductor formula in characteristic p>0

Details On localizations of the characteristic classes of l-adic sheaves and conductor formula in characteristic p>0 On localizations of the characteristic classes of l-adic sheaves and conductor formula in characteristic p>0

2009-05-12

arxiv.org/abs/0905.1753v1

Mathematics

Number Theory

25 pages

Scientific paper

The Grothendieck-Ogg-Shafarevich formula calculates the l-adic Euler-Poincare number of an l-adic sheaf on a curve by an invariant produced by the wild ramification of the l-adic sheaf named Swan class. A. Abbes, K. Kato and T. Saito generalize this formula to any dimensional scheme. In this paper, assuming the strong resolution of singularities we prove a localized version of a formula proved by A. Abbes and T. Saito using the characteristic class of an l-adic sheaf. As an application, we prove a conductor formula in equal characteristic.

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