Finite groups with Frobenius normalizer condition for non-normal primary subgroups

TL;DR

This paper characterizes the structure of finite groups where non-normal primary subgroups satisfy the Frobenius normalizer condition, showing that such groups have a cyclic factor group over the Fitting subgroup and specific Carter subgroup properties.

Contribution

It determines the structure of finite groups with all non-subnormal primary subgroups satisfying the Frobenius condition, extending understanding of subgroup normalizer relations.

Findings

G/F(G) is cyclic.

Maximal non-normal nilpotent subgroups with F(G)U=G are Carter subgroups.

Groups exhibit specific structural properties under the Frobenius condition.

Abstract

A finite group $P$ is said to be \emph{primary} if $|P|=p^{a}$ for some prime $p$. We say a primary subgroup $P$ of a finite group $G$ satisfies the \emph{Frobenius normalizer condition} in $G$ if $N_{G}(P)/C_{G}(P)$ is a $p$-group provided $P$ is $p$-group. In this paper, we determine the structure of a finite group $G$ in which every non-subnormal primary subgroup satisfies the Frobenius normalized condition. In particular, we prove that if every non-normal primary subgroup of $G$ satisfies the Frobenius condition, then $G/F(G)$ is cyclic and every maximal non-normal nilpotent subgroup $U$ of $G$ with $F(G)U=G$ is a Carter subgroup of $G$.