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arXiv 1611.02475math.AGmath.NT
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有限域上的极小三次曲面

Minimal cubic surfaces over finite fields

Sergey Rybakov, Andrey Trepalin

摘要:

设$X$是有限域$\mathbb{F}_q$上的极小三次曲面.伽罗瓦群$\operatorname{Gal}(\overline{\mathbb{F}}_q / \mathbb{F}_q)$在群$\operatorname{Aut}(\operatorname{Pic}(\overline{X}))$中的像$Γ$是Weyl群$W(E_6)$的循环子群。$W(E_6)$中存在循环子群的$25$共轭类,其中的$5$对应于极小三次曲面.人们很自然地会问哪些共轭类来自给定有限域上的最小三次曲面。在本文中,我们给出了这个问题的部分答案,并提出了许多明确的例子。

英文摘要:

Let $X$ be a minimal cubic surface over a finite field $\mathbb{F}_q$. The image $Γ$ of the Galois group $\operatorname{Gal}(\overline{\mathbb{F}}_q / \mathbb{F}_q)$ in the group $\operatorname{Aut}(\operatorname{Pic}(\overline{X}))$ is a cyclic subgroup of the Weyl group $W(E_6)$. There are $25$ conjugacy classes of cyclic subgroups in $W(E_6)$, and $5$ of them correspond to minimal cubic surfaces. It is natural to ask which conjugacy classes come from minimal cubic surfaces over a given finite field. In this paper we give a partial answer to this question and present many explicit examples.

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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