中文

右角Artin群的外自同构群的圆柱双曲性

群论 2026-05-05 v2

摘要

我们研究右角Artin群AΓA_\Gamma的外自同构群的圆柱双曲性。当定义图Γ\Gamma没有SIL对(链接的分离交)时,我们得到了Out(AΓ)\mathrm{Out}(A_\Gamma)是圆柱双曲的充要条件。作为推论,如果Γ\Gamma是满足某种概率条件的随机连通图,那么Out(AΓ)\mathrm{Out}(A_\Gamma)大概率不是圆柱双曲的。当Γ\Gamma具有最大SIL对系统时,我们推导出部分共轭的分类定理。这样的分类定理使我们能够证明Out(AΓ)\mathrm{Out}(A_\Gamma)的圆柱双曲性与特定类型部分共轭的存在性密切相关。

关键词

引用

@article{arxiv.2405.19702,
  title  = {Acylindrical hyperbolicity of outer automorphism groups of right-angled Artin groups},
  author = {Hyungryul Baik and Junseok Kim},
  journal= {arXiv preprint arXiv:2405.19702},
  year   = {2026}
}

备注

Comments are welcome! v2: Corollary 1 has been revised; a detailed proof has been added in Section 5; several remarks and minor corrections were added