Twisted conjugacy in braid groups

Details Twisted conjugacy in braid groups Twisted conjugacy in braid groups

2011-04-29

arxiv.org/abs/1104.5690v1

Mathematics

Group Theory

Scientific paper

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

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