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arXiv 1507.04433math.NT
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Galois闭包问题的统一解法

A unified approach to the Galois closure problem

Hau-Wen Huang, Wen-Ching Winnie Li

摘要:

本文给出了求有限覆盖的Galois闭包问题的一个统一的范畴方法,它包括常见的有限可离域扩张、连通无向图的有限无分歧覆盖、局部连通拓扑空间的有限覆盖空间、光滑射影不可约代数簇的有限代数覆盖和正规簇的有限覆盖等特殊情况.我们提出了两个算法,其输出被证明是所需的伽罗瓦闭包。并给出了每种算法下的Galois闭包度的上界。

英文摘要:

In this paper we give a unified approach in categorical setting to the problem of finding the Galois closure of a finite cover, which includes as special cases the familiar finite separable field extensions, finite unramified covers of a connected undirected graph, finite covering spaces of a locally connected topological space, finite étale covers of a smooth projective irreducible algebraic variety, and finite covers of normal varieties. We present two algorithms whose outputs are shown to be desired Galois closures. An upper bound of the degree of the Galois closure under each algorithm is also obtained.

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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