中文

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 \infty-范畴语言下切除函子的抽象框架,证明由切除函子对 1\ell^1-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 \infty-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。

关键词

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