Skiba, Alexander N.
(ДЗ "Луганський національний університет імені Тараса Шевченка, 2005)
Let G be a finite group. We fix in every noncyclic Sylow subgroup P of G some its subgroup D satisfying 1 <|D| < |P| and study the structure of G under assumption that all
subgroups H of P with |H| = |D| are c-normal in G.