English

Regular Isotopy Classes of Link Diagrams From Thompson's Groups

Geometric Topology 2022-11-11 v3

Abstract

In 2014, Vaughan Jones developed a method to produce links from elements of Thompson's group FF, and showed that all links arise this way. He also introduced a subgroup F\vec{F} of FF and a method to produce oriented links from elements of this subgroup. In 2018, Valeriano Aiello showed that all oriented links arise from this construction. We classify exactly those regular isotopy classes of links that arise from FF, as well as exactly those regular isotopy classes of oriented links that arise from F\vec{F}, answering a question asked by Jones in 2018.

Cite

@article{arxiv.2008.11052,
  title  = {Regular Isotopy Classes of Link Diagrams From Thompson's Groups},
  author = {Rushil Raghavan and Dennis Sweeney},
  journal= {arXiv preprint arXiv:2008.11052},
  year   = {2022}
}

Comments

16 pages, 13 figures. Revised to incorporate comments from referee

R2 v1 2026-06-23T18:05:33.398Z