Powers of half-twists and congruence subgroups of braid groups

Paolo Bellingeri, Celeste Damiani, Oscar Ocampo +1

In this work, we study the relationship between congruence subgroups $B_n[m]$ and ${\mathcal{N}}_n({\sigma }_1^m)$ the normal closure of ${\sigma }_1^m$, where ${\sigma }_1$ is the classical generator of $B…