中文

非塌缩 Ricci 极限空间的半局部单连通性

微分几何 2025-07-08 v2 度量几何

摘要

XX 为非塌缩 Ricci 极限空间,xXx\in X。我们证明对任意 ϵ>0\epsilon>0,存在 r>0r>0,使得 Bt(x)B_t(x) 中的任一环路在 B(1+ϵ)t(x)B_{(1+\epsilon)t}(x) 中可缩,其中 t(0,r]t\in(0,r]。特别地,XX 是半局部单连通的。

关键词

引用

@article{arxiv.1904.06877,
  title  = {Semi-local simple connectedness of non-collapsing Ricci limit spaces},
  author = {Jiayin Pan and Guofang Wei},
  journal= {arXiv preprint arXiv:1904.06877},
  year   = {2025}
}

备注

Slightly modified the proof of Theorem 3.5 to fix a minor error on local covers. Slightly modified the proofs of Lemmas 3.2, 3.6, and 3.8 to fix a minor error on estimating $\rho(t,x)$ by a nearby point. Fixed some typos