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arXiv 2202.03604math.NTmath.AG
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$F$ -同晶超收敛的曲线切割判据

A cut-by-curves criterion for overconvergent of $F$-isocrystals

Thomas Grubb, Kiran S. Kedlaya, James Upton

摘要:

设$X$是有限域上的光滑概形.本文证明了如果$X$上收敛的$F$ -等晶对包含在$X$中的每一条曲线的约束都是过收敛的,则它是过收敛的.使用理论的tale和结晶同伴,我们建立了一个较弱的版本,这个标准中,我们还假设,野生本地monodromy的限制曲线是平凡的拉回沿一个单一的支配态射地位的态射$X$。

英文摘要:

Let $X$ be a smooth scheme over a finite field. It is conjectured that a convergent $F$-isocrystal on $X$ is overconvergent if its restriction to every curve contained in $X$ is overconvergent. Using the theory of étale and crystalline companions, we establish a weaker version of this criterion in which we also assume that the wild local monodromy of the restrictions to curves is trivialized by pullback along a single dominant morphism to $X$.

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