On Commuting Automorphisms of Finite p-Groups with a Metacyclic Quotient

Аннотация

Let G be a finite non-Abelian p-group, where p is an odd prime, such that G/Z(G) is metacyclic. We prove that all commuting automorphisms of G form a subgroup of Aut(G) if and only if G is of nilpotence class 2.