In this paper, we study the behavior of endomorphism rings of indecomposable (uniform)
quasi-injective modules. A very natural question here is, for a morphism f: A→ B, with A, B …

In this paper, we prove that the Bass class with respect to a semidualizing bimodule C
contains all FP-injective S-modules. We introduce the definition of C-FP-injective modules …

We first prove that every countably presented module is a pure epimorphic image of a
countably generated pure-projective module, and by using this we show that if every …

We answer a question posed by Auslander and Bridger. Every homomorphism of modules is
projective-stably equivalent to an epimorphism but is not always to a monomorphism. We …

If $ R $ is a ring with 1, we call a unital left $ R $-module $ M $ co-Hopfian (Hopfian) in the
category of left $ R $-modules if any monic (epic) endomorphism of $ M $ is an …

Let M and N be two modules. M is called automorphism N-invariant if for any essential
submodule A of N, any essential monomorphism f: A→ M can be extended to some g∈ Hom …

Endomorphism rings and the category of finitely generated projective modules Page 1
COMMLTNICATIONS IN ALGEBRA, 28(8), 3837-3 852 (2000) Endomorphism rings and the …

Let R be a ring with identity, and let Mod-R be the category of right R-modules. Let M be a
right R-module. We denote by E (M) the injective hull of M. M is called QF-3′ module, if E …

Throughout this note the ring R is commutative Noetherian with non-zero identity. In [4]
Enochs and Jenda have introduced Extfinite R-modules. The R-module M is called Ext-finite …

In this paper, we introduce the concept of NN-torsion-free modules (respectively, NN-
injective modules) as a generalization of nonnil-torsion-free modules (respectively, injective …