FINITE GROUPS WITH SOME PRIMARY SUBGROUPS F-s-SUPPLEMENTED

Let F be a class of groups. A subgroup H of a group G is called F-s-supplemented in G if there exists a subgroup K of G such that G = HK and K|K ∩ H_G belongs to F. We obtain some results about the F-s-supplemented subgroups and use them to determine the structure of some groups. In particular, some new criteria of p-nilpotency, solubility, supersolubility of a group are obtained.