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arXiv 1603.09404math.AGmath.NT
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关于普通和Hodge-Witt减少的素数

On Primes of Ordinary and Hodge-Witt Reduction

University of Arizona(亚利桑那大学)

Kirti Joshi

AI总结:

论文证明了关于K3表面、阿贝尔三种折面和光滑Fano三种折面的Hodge-Witt减少猜想,并探讨了普通和Hodge-Witt减少的密度差异。

摘要:

Jean-Pierre Serre曾猜测在阿贝尔簇背景下,存在无限多个良好普通减少的素数。本文证明了这一猜想适用于K3表面(定理3.3.1),并独立由Bogomolov和Zarhin通过不同方法验证。任何普通减少的素数同时也是Hodge-Witt减少的素数,但反之不成立。Joshi-Rajan猜想指出存在无限多个Hodge-Witt减少的素数。本文证明了阿贝尔三种折面、光滑Fano三种折面以及具有复乘法的阿贝尔簇的Hodge-Witt减少猜想,并展示了普通和Hodge-Witt减少素数的密度可能不同。定理5.1.1、5.1.3证明了某些完美紧化和大量配置空间的普通减少存在。定理5.2.2探讨了猜想4.1.2、3.2.1与Mustață-Srinivas猜想的关系,并在某些情况下证明了该猜想。第6节讨论了非Hodge-Witt减少的素数存在性,并在多个情况下加以证明。定理7.2.1指出,对于维度≥3且次数≥211的费马超曲面,至少98%的素数为非Hodge-Witt(即非普通)减少,并在次数趋于无穷时,几乎所有素数为非Hodge-Witt(即非普通)减少。第7节提供了多个示例,展示了普通、Hodge-Witt和非Hodge-Witt减少的密度情况。

英文摘要:

Jean-Pierre Serre has conjectured Conj. 3.2.1, in the context of abelian varieties, that there are infinitely primes of good ordinary reduction for a smooth, projective variety over a number field. We prove this conjecture for K3 surfaces Thm 3.3.1 (this is unpublished joint result with C. S. Rajan which was also independently established by Fedor Bogomolov and Yuri Zarhin by a different method). Any prime of ordinary reduction is also a prime of Hodge-Witt reduction but not conversely. Conj. 4.1.2 (of Joshi-Rajan) asserts the existence of infinitely many primes of Hodge-Witt reduction. The two conjectures are related but not equivalent (Thm 4.1.4). We prove the latter conjecture for abelian threefolds Thm 4.3.1 (joint with C. S. Rajan), and smooth Fano threefolds (Thm 4.4.9) and in Thm 4.5.1 for abelian varieties with complex multiplication. We show that the set of primes of ordinary and Hodge-Witt reduction can have different densities (Thm 4.6.11, Example 7.3.1). Thm 5.1.1, Thm 5.1.3 establish the existence of ordinary reductions for certain wonderful compactifications and a large class of configuration spaces. Thm 5.2.2 deals with the relationship between Conj. 4.1.2, Conj. 3.2.1 and the Mustaţǎ-Srinivas conjectures and Thm 5.2.3 establishes this conjecture in some cases. Section 6 deals with existence of primes of non Hodge-Witt reductions and establishes this in a number of cases (Theorem 6.4.3), and Thm 7.2.1 asserts that for Fermat hypersurfaces of dimension $\geq$ 3 and degrees $\geq$ 211, at least 98% of the primes are of non Hodge-Witt (and hence non-ordinary) reduction and in the degree $\rightarrow\infty$ limit, almost all primes are of non Hodge-Witt (and hence non-ordinary) reduction. Section 7 provides a number of examples illustrating densities of ordinary, Hodge-Witt and non Hodge-Witt reductions.

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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