中文

大弧图的渐近维数是无穷的

几何拓扑 2025-08-08 v3

摘要

Σ\Sigma是一个亏格为gg的紧致可定向曲面,并设Γ\Gammaπ0(Σ)\pi_0(\partial \Sigma)上的一个关系,使得指定弧图A(Σ,Γ)\mathcal{A}(\Sigma,\Gamma)是Gromov双曲的且非平凡。我们证明asdimA(Σ,Γ)χ(Σ)1\operatorname{asdim} \mathcal{A}(\Sigma,\Gamma) \geq -\chi(\Sigma) - 1,由此我们证明了大弧图的渐近维数是无穷的。更一般地,Σ\Sigma上的一个弧与曲线模型是Σ\Sigma上简单弧与曲线构成的图,其中PMap(Σ)\operatorname{PMap}(\Sigma)通过置换顶点作用于其上。我们证明任何连通的、Gromov双曲的、余紧的弧与曲线模型M\mathcal{M}满足asdimMg12χ(Σ)\operatorname{asdim} \mathcal{M} \geq g - \lceil\frac{1}{2} \chi(\Sigma)\rceil,并且无穷型曲面上的一大类弧与曲线模型具有无穷渐近维数。

关键词

引用

@article{arxiv.2402.03603,
  title  = {The asymptotic dimension of the grand arc graph is infinite},
  author = {Michael C. Kopreski},
  journal= {arXiv preprint arXiv:2402.03603},
  year   = {2025}
}

备注

19 pages. Asymptotic dimension bounds now apply to connected graphs whose vertices are finite collections of (possibly intersecting) simple arcs and curves. We show any such graph on a compact surface S admitting a cocompact action of PMap(S) is equivariantly quasi-isometric to a graph of markings likewise admitting a cocompact action, which suffices to generalize the techniques of the paper