Out(F_n)子群的Lipschitz收缩与扭曲
群论
2014-11-11 v3 几何拓扑
摘要
给定秩自由群的自由因子,我们刻画了稳定共轭类的子群何时在中扭曲。我们还证明了到的自然嵌入的像是不扭曲的,稳定任何自由分裂共轭类的子群是不扭曲的,并且刻画了稳定任意自由因子系统共轭类的子群何时扭曲。在所有不扭曲的证明中,我们证明了更强的结论:所讨论的子群是Lipschitz收缩核。作为应用,我们确定了和的Dehn函数和自动性。
引用
@article{arxiv.1009.5018,
title = {Lipschitz retraction and distortion for subgroups of Out(F_n)},
author = {Michael Handel and Lee Mosher},
journal= {arXiv preprint arXiv:1009.5018},
year = {2014}
}
备注
Version 3: 35 pages. Revised for publication. Changes from previous versions: significant economies in exposition. Added an explicit description of the stabilizer of a free splitting, in Lemma 18