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arXiv 0705.0031math.NTmath.AG
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用于p-adic差分模块的天鹅导体,II:全局变化

Swan conductors for p-adic differential modules, II: Global variation

Kiran S. Kedlaya

摘要:

使用本地建设从以前的文件,我们表现出一个数值不变,差分天鹅导体,为isocrystal上的各种超过一个完满域的积极特征overconvergent沿边界因子,这导致了类似的建设某些p-adic和l-adic表示的etale基本群的品种。然后,我们证明了这个定义的一些变分性质的过收敛等晶,特别注意的情况下,表面。

英文摘要:

Using a local construction from a previous paper, we exhibit a numerical invariant, the differential Swan conductor, for an isocrystal on a variety over a perfect field of positive characteristic overconvergent along a boundary divisor; this leads to an analogous construction for certain p-adic and l-adic representations of the etale fundamental group of a variety. We then demonstrate some variational properties of this definition for overconvergent isocrystals, paying special attention to the case of surfaces.

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