Finite groups with systems of $K$-$\mathfrak{F}$-subnormal subgroups

Vladimir N. Semenchuk, Alexander N. Skiba

Let $\mathfrak{F}$ be a class of group. A subgroup $A$ of a finite group $G$ is said to be $K$-$\mathfrak{F}$-subnormal in $G$ if there is a subgroup chain $$A=A_{0} \leq A_{1} \leq \…