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arXiv 2403.17871math.AGmath.CO
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关于精细紧致化万有雅可比簇的组合分类

On a combinatorial classification of fine compactified universal Jacobians

Marco Fava

AI总结:

本文推广V-稳定性条件为万有稳定性条件,证明精细紧致化万有雅可比簇可由其组合分类,并指出经典纤维情形严格包含于一般情形,回答Pagani-Tommasi问题。

摘要:

将Viviani在近期预印本中给出的$V$-稳定性条件的定义进行推广,我们引入了万有稳定性条件的概念。基于Pagani和Tommasi的结果,我们证明了精细紧致化万有雅可比簇,即稳定尖点曲线模空间$\overline{\mathcal{M}}_{g,n}$上的精细紧致化雅可比簇,可由万有稳定性条件进行组合分类。我们利用这些稳定性条件证明了以下结论:对于任意$g\geq 2$,在一般情况下,类型$(g,n)$的、其几何点上的纤维是经典的(即由某些数值极化构造的)精细紧致化万有雅可比簇,包含于所有精细紧致化万有雅可比簇类中的包含关系是严格的。这回答了Pagani和Tommasi的一个问题。

英文摘要:

Extending the definition of $V$-stability conditions, given by Viviani in a recent preprint, we introduce the notion of universal stability conditions. Building on results by Pagani and Tommasi, we show that fine compactified universal Jacobians, that is, fine compactified Jacobians over the moduli spaces of stable pointed curves $\overline{\mathcal{M}}_{g,n}$, are combinatorially classified by universal stability conditions. We use these stability conditions to show the following. The inclusion of fine compactified universal Jacobians of type $(g,n)$ whose fibres over geometric points are classical, that is, they are constructed by some numerical polarisations, into the class of all fine compactified universal Jacobians, is strict, in general, for any $g\geq 2$. This answers a question of Pagani and Tommasi.

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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