Automorphism group of the commutator subgroup of the braid group

Orevkov, Stepan Yu.

Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 6, Tome 26 (2017) no. 5, pp. 1137-1161.

Soit $B_n^{\text{'}}$ le groupe dérivé du groupe de tresses $B_n$. On montre que $\text{Aut}\left(B_n^{\text{'}}\right)=\text{Aut}\left(B_n\right)$ pour $n\ge 4$, ce qui répond à une question posée par Vladimir Lin.

Let $B_n^{\text{'}}$ be the commutator subgroup of the braid group $B_n$. We prove that $\text{Aut}\left(B_n^{\text{'}}\right)=\text{Aut}\left(B_n\right)$ for $n\ge 4$. This answers a question asked by Vladimir Lin.

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