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arxiv: 0905.2198 · v1 · submitted 2009-05-13 · 🧮 math.NT · math.AG

On localizations of characteristic classes of l-adic sheaves of rank 1

classification 🧮 math.NT math.AG
keywords rankcharacteristicclassesformulasheavesabbes-kato-saitoabbes-saitoboundary
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The Grothendieck-Ogg-Shafarevich formula is generalized to any dimensional scheme by Abbes-Kato-Saito. In this paper, we introduce two methods of localization of the characteristic classes for sheaves of rank 1 and compare them. As a corollary of this comparison, we obtain a refinement of a formula proved by Abbes-Saito without denominator for a smooth sheaf of rank 1 which is clean with respect to the boundary.

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