arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1904.09263math.AGmath.ATmath.KT
收藏

各向同性动机

Isotropic motives

Alexander Vishik

摘要:

在这篇文章中,我们介绍了局部版本的Voevodsky范畴的动机与Z/p-系数在一个域k,参数有限生成的扩展k。我们引入所谓的弹性场,这一段在动机上是保守的。我们证明,在灵活的领域,构造的本地motivic类别比全球的一个更简单,更让人想起一个拓扑对应。这提供了方便的“本地”不变量,从中可以读取动机信息。我们计算了点的局部motivic上同调,当p=2时,并研究了局部Chow motivic范畴。我们介绍当地的周群和猜想,在灵活的领域,这些应该符合周群模数值等价与Z/p系数,这意味着当地的周动机符合数值周动机。我们在各种情况下证明了这个猜想。

英文摘要:

In this article we introduce the local versions of the Voevodsky category of motives with Z/p-coefficients over a field k, parameterized by finitely-generated extensions of k. We introduce the, so-called, flexible fields, passage to which is conservative on motives. We demonstrate that, over flexible fields, the constructed local motivic categories are much simpler than the global one and more reminiscent of a topological counterpart. This provides handy "local" invariants from which one can read motivic information. We compute the local motivic cohomology of a point, for p=2, and study the local Chow motivic category. We introduce local Chow groups and conjecture that, over flexible fields, these should coincide with Chow groups modulo numerical equivalence with Z/p-coefficients, which implies that local Chow motives coincide with numerical Chow motives. We prove this Conjecture in various cases.

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。

↑