On the conjecture of non-inner automorphisms of finite $p$-groups

Abstract

Let $p$ be a prime number. A longstanding conjecture asserts that every finite non-abelian $p$-group has a non-inner automorphism of order $p$. In this paper, we prove that if $G$ is an odd order finite non-abelian monolithic $p$-group such that every maximal subgroup of $G$ is non-abelian and $[Z(M),g]\le Z(G)$ for every maximal subgroup $M$ of $G$ and $g\in G\setminus M$. Then $G$ has a non-inner automorphism of order $p$ leaving the Frattini subgroup $\Phi (G)$ elementwise fixed.