Geodesic
Isomorphisms of semigroups of endomorphisms of mixed Abelian groups
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (2018), pp. 54-60

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We study Abelian groups such that their endomorphism ring is a unique addition ring. It means that there exists a unique binary operation of addition which turns endomorphism semigroup into a ring. We solve also close questions.
Keywords: mixed Abelian group, endomorphism semigroup, $\mathrm{UA}$-ring. 
@article{IVM_2018_7_a3,
     author = {D. S. Chistyakov},
     title = {Isomorphisms of semigroups of endomorphisms of mixed {Abelian} groups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {54--60},
     publisher = {mathdoc},
     number = {7},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2018_7_a3/}
}
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D. S. Chistyakov. Isomorphisms of semigroups of endomorphisms of mixed Abelian groups. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 7 (2018), pp. 54-60. http://geodesic.mathdoc.fr/item/IVM_2018_7_a3/