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arXiv 2003.12001math.AG
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具有$2$级极点和$6$级零点的亚纯微分的亏格$3$曲线的轨迹

On the locus of genus $3$ curves that admit meromorphic differentials with a zero of order $6$ and a pole of order $2$

Abel Castorena, Quentin Gendron

摘要:

本文的主要目的是计算$\overline{\mathcal{M}}_3$的因子的类,该因子是通过用遗忘映射取$Ω\mathcal{M}_3(6;-2)$的像的闭包而得到的。这是使用Porteous公式和测试曲线理论完成的。为此,我们研究了第二类亚纯微分的轨迹,计算了这些轨迹到$\mathcal{M}_g$的映射的维数,并解决了低亏格中涉及这类微分的计数问题.证明的一个关键工具是最近由Bainbridge-Chen-Gendron-Grushevsky-Möller引入的地层压实。

英文摘要:

The main goal of this article is to compute the class of the divisor of $\overline{\mathcal{M}}_3$ obtained by taking the closure of the image of $Ω\mathcal{M}_3(6;-2)$ by the forgetful map. This is done using Porteous formula and the theory of test curves. For this purpose, we study the locus of meromorphic differentials of the second kind, computing the dimension of the map of these loci to $\mathcal{M}_g$ and solving some enumerative problems involving such differentials in low genus. A key tool of the proof is the compactification of strata recently introduced by Bainbridge-Chen-Gendron-Grushevsky-Möller.

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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