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arXiv 0704.0622math.AG
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关于具有六个尖点的平面六次曲线的模的个数

On the number of moduli of plane sextics with six cusps

Concettina Galati

摘要:

设S是具有六个尖点作为奇点的不可约六次曲线簇。设W是W的不可约分支之一。用M_4表示亏格4的平滑曲线的模空间,W的模映射是将对应于平面曲线D的W的一般点发送到参数化D的归一化曲线的M_4点的有理映射。根据定义,W的模数是W的像相对于模映射的维数。我们知道这个数最多等于7。本文证明了S的两个不可约分支的模的个数都恰好等于7。

英文摘要:

Let S be the variety of irreducible sextics with six cusps as singularities. Let W be one of irreducible components of W. Denoting by M_4 the space of moduli of smooth curves of genus 4, the moduli map of W is the rational map from W to M_4 sending the general point of W, corresponding to a plane curve D, to the point of M_4 parametrizing the normalization curve of D. The number of moduli of W is, by definition the dimension of the image of W with respect to the moduli map. We know that this number is at most equal to seven. In this paper we prove that both irreducible components of S have number of moduli exactly equal to seven.

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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