Quotient groups of IA-automorphisms of a free group of rank 3

V. Metaftsis, A. I. Papistas, H. Sevaslidou

We prove that, for any positive integer $c$, the quotient group ${\gamma }_c(M_3)/{\gamma }_{c+1}(M_3)$ of the lower central series of the McCool group $M_3$ is isomorphic to two copies of…