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arXiv 1607.04778math.AG
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具有自同构的Riemann surfaces方程

Equations of Riemann surfaces with automorphisms

David Swinarski

摘要:

给出了一个计算正则嵌入的具有自同构的黎曼曲面方程的算法。该算法的一个变体与许多启发式的改进是用来产生方程的黎曼曲面$X$与大的自同构群(即,$|\mathrm{Aut}(X)| > 4(g_X-1)$)的属$4 \leq g_X \leq 7$。主要工具是艾希勒迹公式的字符行动的$\mathrm{Aut}(X)$全纯微分,算法生产矩阵发电机的代表一个有限群与指定的不可约字符,和Gröbner基础技术计算扁平分层。

英文摘要:

We present an algorithm for computing equations of canonically embedded Riemann surfaces with automorphisms. A variant of this algorithm with many heuristic improvements is used to produce equations of Riemann surfaces $X$ with large automorphism groups (that is, $|\mathrm{Aut}(X)| > 4(g_X-1)$) for genus $4 \leq g_X \leq 7$. The main tools are the Eichler trace formula for the character of the action of $\mathrm{Aut}(X)$ on holomorphic differentials, algorithms for producing matrix generators of a representation of a finite group with a specified irreducible character, and Gröbner basis techniques for computing flattening stratifications.

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