Relatively Endocoherent Modules Page 1 Algebra Colloquium c© 2007 AMSS CAS & SUZHOU
UNIV Algebra Colloquium 14 : 2 (2007) 327–340 Relatively Endocoherent Modules∗ Lixin Mao …

In this paper, the concepts of (m, n)-coherent modules and (m, n)-semihereditary modules
are given by analogy to the concepts and properties of coherent modules,(m, n)-coherent …

G sub n hyphen coherent rings in various ways comma using G sub n hyphen flat comma G
sub n hyphen injective modules and cotorsion theory period 1 period.. Introduction A ring R …

Let R be a ring and τ a hereditary torsion theory for the category of all left R-modules. A right
R-module M is called τ-flat if Tor 1 (M, R/I)= 0 for any τ-finitely presented left ideal I. A left R …

nX-Projective Modules, nX-Injective Modules, Cotorsion Theories Page 1 Int. J. Contemp. Math.
Sciences, Vol. 5, 2010, no. 56, 2753 - 2762 n-X-Projective Modules, n-X-Injective Modules …

Relative extensions of modules and homology groups - Document - Gale Academic OneFile
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RELATIVE EXTENSIONS OF MODULES AND HOMOLOGY GROUPS* ВIДНОСНI
РОЗШИРЕННЯ МОДУЛIВ ТА ГОМОЛОГIЧНИ Page 1 UDC 512.58 Lixin Mao (Nanjing Inst …

Let M be a left R-module, AA be a family of some submodules of M and BB be a family of
some left R-modules. In this article, we introduce and characterize A A-coherent, PA PA, FA …

Let R be a ring, na fixed non-negative integer and n (n) the class of all right (left) R-modules
of FP-injective (flat) dimension at most n. We prove that ( n⊥ n is a perfect cotorsion theory if …