On central automorphisms of groups and nilpotent rings

Yassine Guerboussa, Bounabi Daoud

Let $G$ be a group. The central automorphism group $Au{t}_c(G)$ of $G$ is the centralizer of $Inn(G)$ the subgroup of $Aut(G)$ of inner automorphisms. There is a one to one map $ σ\m…