Geodesic
Natural classes and torsion free classes in categories of modules
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2006), pp. 101-108.

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The relation between natural classes and torsion free classes of modules is studied. The mapping ϕ:R-nat →\EuScriptP between corresponding lattices is defined and some properties of ϕ are shown, in particular, the compatibility of ϕ with operations of unions in lattices. 
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A. I. Kashu. Natural classes and torsion free classes in categories of modules. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2006), pp. 101-108. https://geodesic-test.mathdoc.fr/item/BASM_2006_3_a9/

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