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arXiv 2209.14535math.AT
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极小CW复形的二重覆叠整同调群与秩为1的$\u2124$-局部系统

Integral homology groups of double coverings and rank one $\mathbb{Z}$-local system for minimal CW complex

Ye Liu, Yongqiang Liu

AI总结:

针对连通有限CW复形的二重覆叠整同调群与对应秩1$\u2124$-局部系统同调群的关系问题,在复形同伦等价于极小CW复形的条件下给出完整解答,证明了相关超平面配置补空间猜想并得到组合决定性结论。

摘要:

设$X$为连通有限CW复形。$X$的连通二重覆叠由非零上同调类$ω∈H^1(X,\u2124_2)$分类,记该二重覆叠空间为$X^ω$,对应$X$上存在非平凡的秩为1的$\u2124$-局部系统$\u2112_ω$。$X^ω$的整同调群与局部系统$\u2112_ω$的同调群之间有何关系?当$X$同伦等价于极小CW复形时,我们给出了该问题的完整解答。这尤其解决了Ishibashi、Sugawara和Yoshinaga近期针对超平面配置补空间提出的一个猜想。作为应用,当$X$为超平面配置补空间且$\u2112_ω$满足特定条件时,我们证明了$H_*(X^ω,\u2124)$是由组合结构决定的。

英文摘要:

Let $X$ be a connected finite CW complex. A connected double covering of $X$ is classified by a non-zero cohomology class $ω\in H^1(X,\mathbb{Z}_2)$. Denote the double covering space by $X^ω$. There exists a corresponding non-trivial rank one $\mathbb{Z}$-local system $\mathcal{L}_ω$ on $X$. What is the relation between the integral homology groups of $X^ω$ and the homology groups of the local system $\mathcal{L}_ω$? When $X$ is homotopy equivalent to a minimal CW complex, we give a complete answer to this question. In particular, this settles a conjecture recently proposed by Ishibashi, Sugawara and Yoshinaga for hyperplane arrangement complement. As an application, when $X$ is a hyperplane arrangement complement and $\mathcal{L}_ω$ satisfies certain conditions, we show that $H_*(X^ω,\mathbb{Z})$ is combinatorially determined.

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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