Abstract
The notion of a near isomorphism is extended from finite-rank torsion-free Abelian groups to some classes of infinite-rank groups. The equivalence of different formulations of this notion for a certain class of countable-rank groups is proved.
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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 22, No. 5, pp. 17–28, 2019.
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Blagoveshchenskaya, E.A., Filimonov, A.V. & Trifonov, A.E. Near Isomorphism for Countable-Rank Torsion-Free Abelian Groups. J Math Sci 259, 394–402 (2021). https://doi.org/10.1007/s10958-021-05628-4
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DOI: https://doi.org/10.1007/s10958-021-05628-4