English

A note on affine links

Group Theory 2015-02-03 v1

Abstract

We view the A~\tilde{A}-type affine braid group as a subgroup of the BB-type braid group. We show that the A~\tilde{A}-type affine braid group surjects onto the AA-type braid group and we detect the kernel of this surjection using Schreier's Theorem. We then describe an injection of the BB-type braid group into the AA-type braid group which allows us finally to give a definition of affine links, as closures of affine braids viewed as A-type braids after composing the above injections, and we prove that the two conditions of Markov are necessary and sufficient to get the same affine closure of any two affine braids.

Keywords

Cite

@article{arxiv.1502.00273,
  title  = {A note on affine links},
  author = {Sadek Al Harbat},
  journal= {arXiv preprint arXiv:1502.00273},
  year   = {2015}
}
R2 v1 2026-06-22T08:18:12.416Z