On products of normal supersoluble subgroups

This paper identifies a certain class of supersoluble groups (called finitely generated hallsiding groups) which contains the finitely generated nilpotent groups, the metacyclic and the finitely generated soluble T-groups. The main result states that the product of a normal finitely generated hallsiding subgroup and a subnormal supersoluble subgroup is always supersoluble. Some results about products of normal locally supersoluble subgroups are also given. 1991 Mathematics Subject Classification: 20F16, 20E25.