Let $G$ be a group. A section $H/K$ where $H$ and $K$ are normal subgroups of $G$ and $K\leq H$ called a chief factor if $H/K$ is a minimal normal subgroup of $G/K$. What are the possible types of chief factors?
I've read somewhere a complemented chief factor of $G$ can't be a Frattini chief factor of $G$. How? Prove or disprove Frattini chief factor of $G$ always abelian?
It's a very new topic to me, so I want to read about chief factors and their properties thoroughly. Can anyone suggest some good books/links to understand this concept.