On $\mathrm{K}$-$\mathbb{P}_{t}$-subnormal subgroups of finite groups and related formations

Abstract: Let $t$ be a fixed natural number. A subgroup $H$ of a group $G$ will be called $\mathrm{K}$-$\mathbb{P}{t}$-subnormal in $G$ if there exists a chain of subgroups $H = H{0} \leq H_{1} \leq \cdots \leq H_{m-1} \leq H_{m} = G$ such that either $H_{i-1}$ is normal in $H_{i}$ or $|H_{i} : H_{i-1}|$ is a some prime $p$ and $p-1$ is not divisible by the $(t+1)$th powers of primes for every $i = 1,\ldots , n$. In this work, properties of $\mathrm{K}$-$\mathbb{P}{t}$-subnormal subgroups and classes of groups with Sylow $\mathrm{K}$-$\mathbb{P}{t}$-subnormal subgroups are obtained.