Abstract:
Let
$\mathfrak H$ be a class of finite groups.
An $\Omega$-foliated formation of finite groups
$\mathfrak F$ with direction
$\varphi$ is called a minimal $\Omega$-foliated non-$\mathfrak H$-formation
$\varphi$, or
a ${\mathfrak H}_{\Omega \varphi}$-critical formation if
$\mathfrak F \nsubseteq \mathfrak H$, but all proper
$\Omega$-foliated subformations with direction $\varphi$ in
$\mathfrak F$ are contained in the class
$\mathfrak H$. In this paper we give a complete description of the structure
of minimal $\Omega$-foliated non-$\mathfrak H$-formations with
$br$-direction
$\varphi$ satisfying the condition
$\varphi\leq\varphi_{3}$.