中文

带或不带翻转的区间交换变换的一致完美性

群论 2021-09-17 v2 动力系统

摘要

G\mathcal G 为所有区间交换变换的群。Arnoux-Fathi([Arn81b])、Sah([Sah81])和 Vorobets([Vor17])的结果表明,G\mathcal G 由其换位子生成的子群 G0\mathcal G_0 是单的。在 [Arn81b] 中,Arnoux 证明了所有带翻转的区间交换变换的群 G\overline{\mathcal G} 是单的。我们确立 G\overline{\mathcal G} 的每个元素的换位子长度不超过 66。此外,我们给出了 G\mathcal G 上保证 G0\mathcal G_0 元素的换位子长度一致有界的条件,并且在此情况下对于任意 gG0g\in \mathcal G_0 该长度至多为 55。由于类似的论证对 G\overline{\mathcal G} 中的对合长度也成立,我们添加了一个附录,其目的是证明 G\overline{\mathcal G} 的每个元素的对合长度不超过 1212

关键词

引用

@article{arxiv.1910.08923,
  title  = {Uniform perfectness for Interval Exchange Transformations with or without Flips},
  author = {Nancy Guelman and Isabelle Liousse},
  journal= {arXiv preprint arXiv:1910.08923},
  year   = {2021}
}

备注

Former arXiv:1910.0823 is completed and split as two parts: This one deals with commutator length for groups of IET with or without flips, we removed AIET sections, the title is changed: we replaced "bounded simplicity" by "uniform perfectness". This text will be published in Ann. Inst. Fourier but it also contains an extra appendix on involution length. The second part is arXiv:2109.05706