Abstract
We obtain a description of quasi-endomorphism rings of torsion-free Abelian groups G of rank 4, 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(A2,B) has rank 2.
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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 22, No. 5, pp. 159–176, 2019.
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Cherednikova, A.V. Quasi-Endomorphism Rings of Some Quasi-Decomposable Torsion-Free Abelian Groups of Rank 4. J Math Sci 259, 494–505 (2021). https://doi.org/10.1007/s10958-021-05641-7
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DOI: https://doi.org/10.1007/s10958-021-05641-7