20E28 20D25 2 norm of Abelian non-cyclic subgroups 2 norm of decomposable subgroups 2 norm of non-cyclic subgroups 2 20D10 1 20D20 1 20E32 1 20E34 1 Wielandt subgroup 1 \(s\)-permutable group 1 cofactors 1 generalized norm 1 generalized norm of a group 1 insoluble groups 1 maximal subgroups 1 norm of a group 1 norm of group 1 norm of infinite Abelian subgroups 1 norm of infinite subgroups 1 quasinormal group 1 soluble groups 1 well \(p\)-embedded group 1