Belous, L.I.; Selkin, V.M.
(Algebra and Discrete Mathematics, 2006)
Let H be some class of groups. A formation F
is called a minimal τ -closed ω-composition non-H-formation [1] if
F * H but F1 ⊆ H for all proper τ -closed ω-composition subformations F₁ of F. In this paper we describe the ...