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arXiv 1109.3294math.AGmath.KTmath.NT
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关于概型上Milnor猜想的注记

Remarks on the Milnor conjecture over schemes

Asher Auel

摘要:

米尔诺猜想一直是推动力理论的二次型领域,指导发展理论的上同调不变量,引进理论的motivic上同调,并触及问题的平方和结构的绝对伽罗瓦群。在这里,我们调查最近的一些工作推广的米尔诺猜想的背景下的计划(主要是光滑簇的领域的特征不2)。令人惊讶的是,一个版本的米尔诺猜想未能保持某些光滑的完整的p-adic曲线,没有合理的theta特征(这是工作的Parimala,Scharlau,和Sridharan)。我们解释了这些例子如何适合更大的范围内的一个unramified米尔诺问题,提供了一个新的方法来解决这个问题,并讨论了新的结果的情况下,曲线在局部域和曲面在有限域。

英文摘要:

The Milnor conjecture has been a driving force in the theory of quadratic forms over fields, guiding the development of the theory of cohomological invariants, ushering in the theory of motivic cohomology, and touching on questions ranging from sums of squares to the structure of absolute Galois groups. Here, we survey some recent work on generalizations of the Milnor conjecture to the context of schemes (mostly smooth varieties over fields of characteristic not 2). Surprisingly, a version of the Milnor conjecture fails to hold for certain smooth complete p-adic curves with no rational theta characteristic (this is the work of Parimala, Scharlau, and Sridharan). We explain how these examples fit into the larger context of an unramified Milnor question, offer a new approach to the question, and discuss new results in the case of curves over local fields and surfaces over finite fields.

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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