Logarithmic moduli of roots of line bundles on curves

Logarithmic moduli of roots of line bundles on curves
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曲线上线束根的对数模

DOI:
10.1016/j.exmath.2023.04.001
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发表时间:
2022
影响因子:
0.7
通讯作者:
G. Orecchia
G. Orecchia
中科院分区:
数学4区
文献类型:
--
作者:
D. Holmes;G. Orecchia

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利用对数线束理论构造了曲线族上线束根空间的紧化,推广了一些作者的工作。这是通过对热带雅可比矩阵和对数雅可比矩阵(最近由Molcho和Wise构建)的扭转的研究来实现的。我们的模空间带有一个“双分支循环”,测量给定根与平凡束同构的轨迹,并且我们用分段多项式函数的语言给出了该类的重言式(最近由Molcho-Pandharipande-Schmitt和Holmes-Schwarz开发)。
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).
雅可比曲线模型
DOI: 10.1515/crelle-2023-0031
发表时间: 2023
期刊: Journal für die reine und angewandte Mathematik (Crelles Journal)
影响因子: --
作者:
Holmes D
通讯作者: Holmes D