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arXiv 1804.04442math.AG
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有限域上Fermat曲面的平面截面

Plane sections of Fermat surfaces over finite fields

H. Borges, G. Cook, M. Coutinho

摘要:

本文刻画了由Fermat曲面$$ \mathcal{S} : X_0^d + X_1^d + X_2^d +X_3^d = 0, $$的平面截面$$ \mathcal{P} : X_3-e_0X_0-e_1X_1-e_2X_2 = 0 $$所产生的$\mathbb{F}_q$上的所有曲线,其中$q = p^{h} = 2d+1$是素数幂,$p >3$,和$e_0, e_1, e_2 \in \mathbb{F}_q$ .特别是,我们将证明,任何非线性组件$\mathcal{G} \subseteq \mathcal{P} \cap \mathcal{S} $是一个光滑的经典曲线的程度$n\leqslant d$达到Stöhr-Voloch界$$ \# \mathcal{G}(\mathbb{F}_q) \leqslant \frac{1}{2} n(n+q-1) - \frac{1}{2} i(n-2), $$与$i \in \{0,1,2,3,n,3n\}$。

英文摘要:

In this paper, we characterize all curves over $\mathbb{F}_q$ arising from a plane section $$ \mathcal{P} : X_3-e_0X_0-e_1X_1-e_2X_2 = 0 $$ of the Fermat surface $$ \mathcal{S} : X_0^d + X_1^d + X_2^d +X_3^d = 0, $$ where $q = p^{h} = 2d+1$ is a prime power, $p >3$, and $e_0, e_1, e_2 \in \mathbb{F}_q$. In particular, we will prove that any nonlinear component $\mathcal{G} \subseteq \mathcal{P} \cap \mathcal{S} $ is a smooth classical curve of degree $n\leqslant d$ attaining the Stöhr-Voloch bound $$ \# \mathcal{G}(\mathbb{F}_q) \leqslant \frac{1}{2} n(n+q-1) - \frac{1}{2} i(n-2), $$ with $i \in \{0,1,2,3,n,3n\}$.

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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