抽象切除与 $\ell^1$-同调
代数拓扑
2024-04-05 v2 范畴论
摘要
我们使用 -范畴语言下切除函子的抽象框架,证明由切除函子对 -同调函子的最佳逼近是平凡的。随后我们尽力从概念层面为不熟稔 -范畴者解释所用语言,证明奇异链复形函子在抽象意义下确为切除的,并展示后者如何导出以 Mayer-Vietoris 序列为形式的经典切除陈述。
引用
@article{arxiv.2203.06120,
title = {Abstract Excision and $\ell^1$-Homology},
author = {Johannes Witzig},
journal= {arXiv preprint arXiv:2203.06120},
year = {2024}
}
备注
35 pages; v2: revised version, including: comments on related results (Introduction), more explicit handling of "size" (Introduction, Remarks 2.3, 2.4, 2.11), removal of claim about homology from Theorem 1.7, further explanatory material (Outlook 2.24, Section 2.4); to appear in Confluentes Mathematici