ABSTRACT A module M is said to be square free if whenever its submodule is isomorphic to
N 2= N⊕ N for some module N, then N= 0. Dually, a module M is said to be d-square free …

A ring R is called left P-coherent in case each principal left ideal of R is finitely presented. A
left R-module M (resp. right R-module N) is called D-injective (resp. D-flat) if Ext1 (G, M)= 0 …

A module M is called closed weak supplemented if for any closed submodule N of M, there
is a submodule K of M such that M= K+ N and K∩ N<< M. Any direct summand of closed …

Let C be a class of R-modules closed under isomorphisms and finite direct sums. It is first
shown that the finite direct sum of almost C-precovers is an almost C-precover and the direct …

Let S and R be rings, SCR be a semidualizing bimodule and n≥ 0 be an integer or n=∞.
We introduce and study C-FP n-injective and C-FP n-flat modules as a common …

This paper introduces and studies the ϕ-uS-flat (resp., nonnil-uS-injective) modules, which
are a generalization of both ϕ-flat modules and uS-flat modules (resp., both nonnil-injective …

J. Korean Math. Soc. 46 (2009), No. 1, pp. 51–58 Page 1 J. Korean Math. Soc. 46 (2009), No. 1,
pp. 51–58 THE CLASS OF MODULES WITH PROJECTIVE COVER YONGHUA GUO …

Lomp [9] has studied finitely generated projective modules over semilocal rings. He
obtained the following: finitely generated projective modules over semilocal rings are …

ALMOST PRINCIPALLY SMALL INJECTIVE RINGS 1. Introduction Let R be a ring. A right ideal I
of R is called small if, for every pro Page 1 J. Korean Math. Soc. 48 (2011), No. 6, pp. 1189–1201 …

Derived Functors of Hom Relative to n-Flat Covers | SpringerLink Skip to main content
Advertisement SpringerLink Log in Menu Find a journal Publish with us Search Cart 1.Home …