[PDF][PDF] f-Projective and f-Injective Modules
G Yuxian - JOURNAL OF MATHEMATICAL RESEARCH AND …, 2008 - academia.edu
Let R be a ring. A right R-module M is called f-projective if Ext1 (M, N)= 0 for any f-injective
right R-module N. We prove that (F-proj, F-inj) is a complete cotorsion theory, where F-proj …
right R-module N. We prove that (F-proj, F-inj) is a complete cotorsion theory, where F-proj …
DG-projective, injective and flat complexes
X Yang, Z Liu - Algebra Colloquium, 2013 - World Scientific
In this article, we characterize some rings in terms of the DG-projective, injective and flat
complexes. We also give some connections between DG-injective complexes and DG-flat …
complexes. We also give some connections between DG-injective complexes and DG-flat …
Ding modules and dimensions over formal triangular matrix rings
L Mao - arXiv preprint arXiv:1912.06968, 2019 - arxiv.org
Let $ T=\biggl (\begin {matrix} A&0\\U&B\end {matrix}\biggr) $ be a formal triangular matrix
ring, where $ A $ and $ B $ are rings and $ U $ is a $(B, A) $-bimodule. We prove that:(1) If …
ring, where $ A $ and $ B $ are rings and $ U $ is a $(B, A) $-bimodule. We prove that:(1) If …
[PDF][PDF] FP-injectivity relative to a semidualizing bimodule
X Tang - Publ. Math. Debrecen, 2012 - publi.math.unideb.hu
In this paper, we extend the notion of C-injective module to that of C-FP-injective module,
where S CR is a semidualizing bimodule over associative rings. We first obtain a result on …
where S CR is a semidualizing bimodule over associative rings. We first obtain a result on …
Ding projective dimension of Gorenstein flat modules
J Wang - 대한수학회보, 2017 - dbpia.co.kr
Let $ R $ be a Ding-Chen ring. Yang\cite {Yang2012} and Zhang\cite {Zhang2015} asked
whether or not every $ R $-module has finite Ding projective or Ding injective dimension. In …
whether or not every $ R $-module has finite Ding projective or Ding injective dimension. In …
Weak global dimension of coherent rings
L Mao, N Ding - Communications in Algebra, 2007 - Taylor & Francis
In this article, we study the weak global dimension of coherent rings in terms of the left FP-
injective resolutions of modules. Let R be a left coherent ring and ℱ ℐ the class of all FP …
injective resolutions of modules. Let R be a left coherent ring and ℱ ℐ the class of all FP …
The homological dimensions of simple modules
N Ding, J Chen - Bulletin of the Australian Mathematical Society, 1993 - cambridge.org
We prove that (a) if R is a commutative coherent ring, the weak global dimension of R equals
the supremum of the flat (or (FP–) injective) dimensions of the simple R-modules;(b) if R is …
the supremum of the flat (or (FP–) injective) dimensions of the simple R-modules;(b) if R is …
On max-flat and max-cotorsion modules
Y Alagöz, E Büyükaşık - Applicable Algebra in Engineering …, 2021 - Springer
In this paper, we continue to study and investigate the homological objects related to s-pure
and neat exact sequences of modules and module homomorphisms. A right module A is …
and neat exact sequences of modules and module homomorphisms. A right module A is …
Notes on cotorsion modules
L Mao, N Ding - Communications in Algebra®, 2005 - Taylor & Francis
Let R be a ring. A right R-module C is called cotorsion if for any flat right R-module biF. In
this paper, we first give some results on cotorsion envelopes that are analogous to those on …
this paper, we first give some results on cotorsion envelopes that are analogous to those on …
[PDF][PDF] Homological invariants related to semidualizing bimodules
X Tang, Z Huang - Colloquium Mathematicum, 2019 - researchgate.net
Let R and S be rings and RCS a semidualizing bimodule. We show that the supremum of the
C-projective dimensions of C-flat left R-modules is less than or equal to that for left R …
C-projective dimensions of C-flat left R-modules is less than or equal to that for left R …