Geodesic
Torsion-free Abelian groups of finite rank with marked bases
Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 4, pp. 201-228.

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We define a one-to-one correspondence between torsion-free Abelian groups of finite rank with marked bases and finite sequences of elements of finitely presented modules over the ring of polyadic numbers. This correspondence is a duality of two categories. 
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A. A. Fomin. Torsion-free Abelian groups of finite rank with marked bases. Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 4, pp. 201-228. http://geodesic.mathdoc.fr/item/FPM_2019_22_4_a13/

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