arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.01412math.NT
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Pink的Hodge结构理论与函数域上的Hodge猜想

Pink's theory of Hodge structures and the Hodge conjecture over function fields

Urs Hartl, Ann-Kristin Juschka

摘要:

1997年,Richard Pink提出了正特征函数域上的Hodge结构的概念,即现在的Hodge-Pink结构。它们在底层函数域上形成一个中性的Tannakian范畴。他定义了霍奇实现函子从可一致化交换$t$ -模和$t$ -动机的格雷格安德森霍奇-粉红色的结构。这使得人们可以将每个可一致化的$t$ -动机与一个霍奇-平克群相关联,类似于复数上光滑投射簇的芒福德-泰特群。它进一步使粉红色证明类似的芒福德-泰特猜想德林费尔德模块。此外,基于Pink和第一作者未发表的工作,第二作者在她的学位论文中证明了Hodge-Pink群等于Papanikolas和Taelman定义的$t$ -motive的motivic伽罗瓦群。这产生了著名的霍奇猜想的精确模拟,霍奇猜想是复数上的一个杰出的开放问题。在这份报告中,我们解释粉红色的结果霍奇结构和证明的功能领域模拟霍奇猜想。$t$ -动机理论在双重$t$ -动机理论中有一个变体。我们阐明了$t$ -模、对偶$t$ -模和$t$ -模之间的关系.我们还构造了交换$t$ -模和(对偶)$t$ -模的上同调实现以及它们之间的比较同构,推广了Drinfeld模的Gekeler de Rham同构.

英文摘要:

In 1997 Richard Pink has clarified the concept of Hodge structures over function fields in positive characteristic, which today are called Hodge-Pink structures. They form a neutral Tannakian category over the underlying function field. He has defined Hodge realization functors from the uniformizable abelian $t$-modules and $t$-motives of Greg Anderson to Hodge-Pink structures. This allows one to associate with each uniformizable $t$-motive a Hodge-Pink group, analogous to the Mumford-Tate group of a smooth projective variety over the complex numbers. It further enabled Pink to prove the analog of the Mumford-Tate Conjecture for Drinfeld modules. Moreover, based on unpublished work of Pink and the first author, the second author proved in her Diploma thesis that the Hodge-Pink group equals the motivic Galois group of the $t$-motive as defined by Papanikolas and Taelman. This yields a precise analog of the famous Hodge Conjecture, which is an outstanding open problem for varieties over the complex numbers. In this report we explain Pink's results on Hodge structures and the proof of the function field analog of the Hodge conjecture. The theory of $t$-motives has a variant in the theory of dual $t$-motives. We clarify the relation between $t$-motives, dual $t$-motives and $t$-modules. We also construct cohomology realizations of abelian $t$-modules and (dual) $t$-motives and comparison isomorphisms between them generalizing Gekeler's de Rham isomorphism for Drinfeld modules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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