THE FULLY INVARIANT EXTENDING PROPERTY FOR ABELIAN GROUPS
THE FULLY INVARIANT EXTENDING PROPERTY FOR ABELIAN GROUPS
Abstract An abelian group has the FI-extending property if every fully invariant subgroup is essential in a direct summand. A mixed abelian group has the FI-extending property if and only if it is a direct sum of a torsion and a torsion-free abelian group, both with the FI-extending property. A …