Almost-crystallographic groups as quotients of Artin braid groups

Daciberg Lima Gonçalves, John Guaschi, Oscar Ocampo

Let $n,k\ge 3$. In this paper, we analyse the quotient group $B\_n/\Gamma \_k(P\_n)$ of the Artin braid group $B\_n$ by the subgroup $\Gamma \_k(P\_n)$ belonging to the lower central series…