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arXiv 2006.09689math.SG
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曲面、球形对象和映射类群的基本类别

Fukaya categories of surfaces, spherical objects, and mapping class groups

Denis Auroux, Ivan Smith

摘要:

证明了亏格至少为2且其Chern特征标表示非零霍赫希尔德同调类的闭曲面的导出的类范畴中的每一个球面对象都拟同构于一条配备秩为1的局部系统的简单闭曲线. (The同源假设是必要的。)这在很大程度上回答了海登、卡察尔科夫和孔采维奇的一个问题。由此可见,从类范畴的自等价群到映射类群存在一个自然满射。证明呼吁和说明许多最近的事态发展:包类,sheafifying类,有限和连续的群作用等变弗洛尔理论,同调镜像对称的代数模型。应用到高维辛映射类群。

英文摘要:

We prove that every spherical object in the derived Fukaya category of a closed surface of genus at least two whose Chern character represents a non-zero Hochschild homology class is quasi-isomorphic to a simple closed curve equipped with a rank one local system. (The homological hypothesis is necessary.) This largely answers a question of Haiden, Katzarkov and Kontsevich. It follows that there is a natural surjection from the autoequivalence group of the Fukaya category to the mapping class group. The proofs appeal to and illustrate numerous recent developments: quiver algebra models for wrapped categories, sheafifying the Fukaya category, equivariant Floer theory for finite and continuous group actions, and homological mirror symmetry. An application to high-dimensional symplectic mapping class groups is included.

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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