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arXiv 2603.07565math.GT
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零 genus 二次微分Strata的基本群 via 交换图

Fundamental Groups of Genus-$0$ Quadratic Differential Strata via Exchange Graphs

Jeonghoon So

AI总结:

本文通过交换图技术研究零 genus 二次微分strata的基本群,通过推广三角剖分的组合学并引入额外关系,给出了显式基本群表示。

摘要:

我们研究了如何利用交换图技术来研究二次微分的strata的拓扑结构。交换图提供了自然的基本群生成元。通过将三角剖分的组合学扩展到加权混合角剖分,我们推广了在简单零点情况下熟悉的关系,并引入了一种仅在高阶零点周围出现的额外关系。在零 genus 情况下有四个奇点时,我们证明这些关系足以给出基本群的显式表示。

英文摘要:

We investigate how exchange-graph techniques can be used to study the topology of strata of meromorphic quadratic differentials. The exchange graph provides natural generators for the fundamental group. By extending the combinatorics of triangulations to weighted mixed-angulations, we generalise the familiar relations arising in the simple-zero case and introduce an additional relation that appears only around higher-order zeroes. In the genus-zero case with four singularities, we show that these relations suffice to give explicit presentations of the fundamental group.

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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