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arXiv 1707.04248math.AGmath.ATmath.KTmath.RT
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正特征的非对易动机及其应用

Noncommutative motives in positive characteristic and their applications

Goncalo Tabuada

摘要:

设k是具有正特征的基域。利用拓扑周期循环同调,我们首先证明了范畴的非交换的数值动机在k上是阿贝尔半单的,作为所证明的Kontsevich。然后,我们建立了一个意义深远的非交换推广的Weil定理,最初证明了Dwork和Grothendieck。同样,我们建立了一个意义深远的非交换推广的上同调解释的Hasse-Weil zeta函数,最初证明了Hesselholt。作为第三个主要结果,我们证明了每个光滑真dg范畴的数值Grothendieck群是Kuznetsov所声称的(没有证明)的自由生成的自由阿尔贝群。然后,我们介绍了非交换motivic伽罗瓦(超)群,并根据Kontsevich的见解,将它们与经典的交换对应物。最后,我们解释了如何动机的措施,诱导Berthelot的刚性上同调可以恢复从理论的非交换动机。

英文摘要:

Let k be a base field of positive characteristic. Making use of topological periodic cyclic homology, we start by proving that the category of noncommutative numerical motives over k is abelian semi-simple, as conjectured by Kontsevich. Then, we establish a far-reaching noncommutative generalization of the Weil conjectures, originally proved by Dwork and Grothendieck. In the same vein, we establish a far-reaching noncommutative generalization of the cohomological interpretations of the Hasse-Weil zeta function, originally proven by Hesselholt. As a third main result, we prove that the numerical Grothendieck group of every smooth proper dg category is a finitely generated free abelian group, as claimed (without proof) by Kuznetsov. Then, we introduce the noncommutative motivic Galois (super-)groups and, following an insight of Kontsevich, relate them to their classical commutative counterparts. Finally, we explain how the motivic measure induced by Berthelot's rigid cohomology can be recovered from the theory of noncommutative motives.

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