Objets algébriquement clos et injectifs dans les catégories localement présentables
On a generalized small-object argument for the injective subcategory problem
On Filtered Modules and their Associated Graded Modules.
On flat covers in varieties
Flat covers do not exist in all varieties. We give a necessary condition for the existence of flat covers and some examples of varieties where not all algebras have flat covers.
On Gorenstein flat preenvelopes of complexes
On Injective Rational Coefficient Systems.
On *-modules generating the injectives
On projective and injective objects of the categories dual to .
On pure semi-simple Grothendieck categories I
On superfluous subsemimodules.
On the Axiomatizability of Certain Classes of Modules.
On the characterization of Jonsson-Tarski and of subtractive varieties
On the object-wise tensor product of functors to modules.
On weak -homotopy equivalences of modules
Si definisce il gruppo di —omotopia di un singolo modulo e si introduce la nozione di equivalenza -omotopica debole. Sotto determinate condizioni per l'anello di base oppure per i moduli considerati, le equivalenze -omotopiche deboli coincidono con le equivalenze -omotopiche (forti).