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arXiv 1902.10201math.AG
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具有多个内伽罗瓦点的曲线

Curves with more than one inner Galois point

Gábor Korchmáros, Stefano Lia, Marco Timpanella

摘要:

设$\mathcal{C}$是$\text{PG}(2,\mathbb{K})$的不可约平面曲线,其中$\mathbb{K}$是具有特征$p\geq 0$的代数闭域.如果$Q$的投影$π_Q$是伽罗瓦,则点$Q\in \mathcal{C}$是$\mathcal{C}$的内伽罗瓦点。假设$\mathcal{C}$有两个不同的内伽罗瓦点$Q_1$和$Q_2$,都是单的。令$G_1$和$G_2$是各自的伽罗瓦群。在$G_i$修复$Q_i$的假设下,对于$i=1,2$,我们提供了$G=\langle G_1,G_2 \rangle$的完整分类,并展示了每个这样的$G$的曲线。我们的证明依赖于群论的更深层次的结果。

英文摘要:

Let $\mathcal{C}$ be an irreducible plane curve of $\text{PG}(2,\mathbb{K})$ where $\mathbb{K}$ is an algebraically closed field of characteristic $p\geq 0$. A point $Q\in \mathcal{C}$ is an inner Galois point for $\mathcal{C}$ if the projection $π_Q$ from $Q$ is Galois. Assume that $\mathcal{C}$ has two different inner Galois points $Q_1$ and $Q_2$, both simple. Let $G_1$ and $G_2$ be the respective Galois groups. Under the assumption that $G_i$ fixes $Q_i$, for $i=1,2$, we provide a complete classification of $G=\langle G_1,G_2 \rangle$ and we exhibit a curve for each such $G$. Our proof relies on deeper results from group theory.

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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