
The balanced subgroups of Fuchs are generalised to arbitrary abelian groups. Projectives and injectives with respect to general balanced exact sequences are classified; a new class of groups is introduced in order to classify these projectives.
Torsion-free groups, finite rank, Homological and categorical methods for abelian groups, Subgroups of abelian groups, Torsion groups, primary groups and generalized primary groups, Abelian groups
Torsion-free groups, finite rank, Homological and categorical methods for abelian groups, Subgroups of abelian groups, Torsion groups, primary groups and generalized primary groups, Abelian groups
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