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arXiv 2201.06869math.AG
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曲线上线丛根的对数模

Logarithmic moduli of roots of line bundles on curves

David Holmes, Giulio Orecchia

AI总结:

本研究利用对数线丛理论,通过研究热带与对数雅可比的挠元,构造了曲线上线丛根空间的紧化,并给出模空间上双分歧闭链的tautological公式,推广了已有相关研究。

摘要:

我们利用对数线丛理论构造一族曲线上某线丛的根空间的紧化,推广了多位学者的研究工作。该构造通过研究热带与对数雅可比(由Molcho和Wise近期构建)中的挠元来实现。我们的模空间带有一个“双分歧闭链”,用于度量给定根同构于平凡丛的轨迹,并且我们采用分段多项式函数的语言(由Molcho-Pandharipande-Schmitt与Holmes-Schwarz近期发展)给出了该类的一个 tautological 公式。

英文摘要:

We use the theory of logarithmic line bundles to construct compactifications of spaces of roots of a line bundle on a family of curves, generalising work of a number of authors. This runs via a study of the torsion in the tropical and logarithmic jacobians (recently constructed by Molcho and Wise). Our moduli space carries a `double ramification cycle' measuring the locus where the given root is isomorphic to the trivial bundle, and we give a tautological formula for this class in the language of piecewise polynomial functions (as recently developed by Molcho-Pandharipande-Schmitt and Holmes-Schwarz).

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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