The pseudorational rank of an Abelian group.
The size of an annihilator in a factorization.
The splitting length of mixed Abelian groups of rank one
The splitting of the tensor product of two mixed abelian groups of rank one
The structure of digraphs associated with the congruence
We assign to each pair of positive integers and a digraph whose set of vertices is and for which there is a directed edge from to if . We investigate the structure of . In particular, upper bounds are given for the longest cycle in . We find subdigraphs of , called fundamental constituents of , for which all trees attached to cycle vertices are isomorphic.
The Structure of Ext (A,..) and V = L.
The theory of dual groups
We study the -theory of sequences of dual groups and give a complete classification of the -elementary classes by finding simple invariants for them. We show that nonstandard models exist.
The -inductive topology on abelian -groups
Theorien abelscher Gruppen mit einem einstelligen Prädikat
Torsion groups in cortorsion classes
Torsion-free abelian groups and completely decomposable -adic modules
Translačné štruktúry. Centrálne a necentrálne translačné štruktúry
Treillis d'idéaux et structure d'anneaux
Trivial units in commutative group algebras.
Two combinatorial problems in group theory
Two notes on radicals of Abelian groups
Two problems on varieties of groups generated by wreath products.
Übe die Anzahl Abelscher Gruppen gegebener Ordnung. II.
Über die affin vollständigen, erzeugbaren Moduln.
Über die Anzahl Abelscher Gruppen gegebener Ordnung.