Аннотация:
The preradicals associated to the functor $Hom_R(U,-)\colon R\text-Mod\to\mathcal Ab$ are revealed, their properties and the relations between these preradicals are studied.
Ключевые слова и фразы:preradical, torsion, cotorsion, functor, torsion class, torsionfree class.
Полный текст:
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