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arXiv 2209.07010math.AG
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计算Fano问题的伽罗瓦群

Computing Galois groups of Fano problems

Thomas Yahl

摘要:

一个Fano问题包括枚举一个固定尺寸的线性空间的品种,推广的经典问题的27条线的三次曲面。这些具有多个线性空间的Fano问题有一个相关的伽罗瓦群,它作用于这些线性空间,并通过根式控制在坐标中计算它们的复杂性。Fano问题的伽罗瓦群首先由Jordan研究,他考虑了三次曲面上27条直线问题的伽罗瓦群。最近,Hashimoto和Kadets通过在一种特殊情况下确定所有的Fano问题的Galois群,并证明所有的Fano问题都有包含交错群的Galois群,从而对Fano问题的所有Galois群进行了分类.我们使用计算工具来证明几个中等规模的Fano问题的伽罗瓦群等于对称群,其中每一个是以前未知的。

英文摘要:

A Fano problem consists of enumerating linear spaces of a fixed dimension on a variety, generalizing the classical problem of 27 lines on a cubic surface. Those Fano problems with finitely many linear spaces have an associated Galois group that acts on these linear spaces and controls the complexity of computing them in coordinates via radicals. Galois groups of Fano problems were first studied by Jordan, who considered the Galois group of the problem of 27 lines on a cubic surface. Recently, Hashimoto and Kadets nearly classified all Galois groups of Fano problems by determining them in a special case and by showing that all other Fano problems have Galois group containing the alternating group. We use computational tools to prove that several Fano problems of moderate size have Galois group equal to the symmetric group, each of which were previously unknown.

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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