The cotypeset of a torsion free abelian group of rank two

The cotypeset of a torsion free abelian group of rank two
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Proc. Amer. Math. Soc. 84 (1982), 467-473

DOI: https://doi.org/10.1090/S0002-9939-1982-0643731-X

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The cotypeset (set of types of rank one factors) of a torsion free abelian group of rank two is characterized.

References

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Rings with additive group which is a torsion-free group of rank two

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