In the last few years, López-Permouth and several collaborators have introduced a new
approach in the study of the classical projectivity, injectivity and flatness of modules. This …

Let R be a ring with an identity element. We prove that R is right Kasch if and only if injective
hull of every simple right R-modules is neat-flat if and only if every absolutely pure right R …

Let R be a ring. A right R-module M is said to be neat-flat if the kernel of any epimorphism
Y→ M is neat in Y, ie, the induced map Hom (S, Y)→ Hom (S, M) is surjective for any simple …

In this paper, we introduce an X-precover completing domain X− 1 (L), with L being a class
of modules and not necessarily a single module, and then investigate when every module in …

Propiedades homológicas de los módulos tales como la inyectividad, proyectividad,
planitud, etc. se han considerado clásicamente como atributos que los módulos pueden …

Let R be a ring. A right R-module M is said to be neat-flat if the kernel of any epimorphism Y-
> M is neat in Y, ie, the induced map Hom (S, Y)-> Hom (S, M) is surjective for any simple …

En los últimos años, López-Permouth y varios colaboradores han introducido un nuevo
enfoque en el estudio de la proyectividad, inyectividad y planitud clásicas de los módulos …

Let R be a ring and 𝑆 be a class of some finitely generated left R-modules. Then a left R-
module M is called 𝑆-projective if for every homomorphism f: S→ M, where S∈ 𝑆, there exist …

The main purpose of this thesis is to study some classes of modules determined by neat,
coneat and s-pure submodules. A right R-module M is called neat-flat (resp. coneat-flat) if …

Throughout this note, R is a ring with an identity element and all modules are unital R-
modules. MR denotes a right R-module. For an R-module M, the character module HomZ …