Abstract
We obtain a description of quasi-endomorphism rings of torsion-free Abelian groups G of rank 4 that are quasi-decomposable into a direct sum of groups A1 and A2 of rank 1 and a strongly indecomposable group B of rank 2 in the case where the quasi-homomorphism group ℚ ⨂ Hom(B,A2) has rank 2.
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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 20, No. 5, pp. 209–225, 2015.
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Cherednikova, A.V. On the Quasi-Endomorphism Rings of Quasi-Decomposable Torsion-Free Abelian Groups of Rank 4 with a Strongly Indecomposable Quasi-Summand of Rank 2. J Math Sci 230, 491–501 (2018). https://doi.org/10.1007/s10958-018-3757-5
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DOI: https://doi.org/10.1007/s10958-018-3757-5