On a special class of p-groups

Abstract

In Theorem 1.2 we may put L = G, Hi = ~k_z(G) (l = 0,1 .... , k) and Hi = 1 (l >/~).We find that for 0Further, for any group G we denote by G >~ G' >~ G" ~ ... >~ G (t-1) >1 G ~f~ >1