中文

关于R. Thompson群$F$的Jones子群

群论 2015-04-17 v4

摘要

最近Vaughan Jones证明了R. Thompson群FF以自然方式编码所有纽结,而FF的某个子群F\vec F编码所有有向纽结。我们回答了Jones关于F\vec F的几个问题。特别地,我们证明子群F\vec Fx0x1,x1x2,x2x3x_0x_1, x_1x_2, x_2x_3生成(其中xi,i=0,1,2,...x_i, i=0,1,2,...FF的标准生成元),并且同构于F3F_3——即所有斜率为33的幂、断点为33-进有理数的FF的类似物。我们还证明了F\vec F与其可公度子群重合。因此FFF/FF/\vec F上的置换表示的线性化是不可约的。

关键词

引用

@article{arxiv.1501.00724,
  title  = {On Jones' subgroup of R. Thompson group $F$},
  author = {Gili Golan and Mark Sapir},
  journal= {arXiv preprint arXiv:1501.00724},
  year   = {2015}
}

备注

First draft, 14 pages; v2: Second draft, added Section 5 generalizing the main results from $n=2$ to arbitrary $n>1$. v3: Added a subsection about natural homomorphisms and caret replacement homomorphisms v4: Added a section proving, in particular, that the Thompson index of a link is bounded by a linear function in the number of crossings in a link diagram, added some open problems