English

Twisted conjugacy in braid groups

Group Theory 2011-05-02 v1

Abstract

In this note we solve the twisted conjugacy problem for braid groups, i.e. we propose an algorithm which, given two braids u,vBnu,v\in B_n and an automorphism ϕAut(Bn)\phi \in Aut (B_n), decides whether v=(ϕ(x))1uxv=(\phi (x))^{-1}ux for some xBnx\in B_n. As a corollary, we deduce that each group of the form BnHB_n \rtimes H, a semidirect product of the braid group BnB_n by a torsion-free hyperbolic group HH, has solvable conjugacy problem.

Keywords

Cite

@article{arxiv.1104.5690,
  title  = {Twisted conjugacy in braid groups},
  author = {Juan González-Meneses and Enric Ventura},
  journal= {arXiv preprint arXiv:1104.5690},
  year   = {2011}
}
R2 v1 2026-06-21T18:00:33.812Z