[HTML][HTML] Minimal semi-flat-cotorsion replacements and cosupport

T Nakamura, P Thompson - Journal of Algebra, 2020 - Elsevier
Over a commutative noetherian ring R of finite Krull dimension, we show that every complex
of flat cotorsion R-modules decomposes as a direct sum of a minimal complex and a …

Minimal complexes of cotorsion flat modules

P Thompson - arXiv preprint arXiv:1702.02985, 2017 - arxiv.org
Let R be a commutative noetherian ring. We give criteria for a complex of cotorsion flat R-
modules to be minimal, in the sense that every self homotopy equivalence is an …

Cotorsion dimension of unbounded complexes

W Ren, Z Liu - Communications in Algebra, 2013 - Taylor & Francis
We extend the cotorsion dimension of R-modules to unbounded R-complexes by applying
the flat model structure on Ch (R) proposed by J. Gillespie. This is not natural because there …

Homological dimensions in cotorsion pairs

LA Hügel, OM Hernández - Illinois Journal of Mathematics, 2009 - projecteuclid.org
Given a ring $ R $, two classes $\mathcal A $ and $\mathcal B $ of $ R $-modules are said
to form a cotorsion pair $(\mathcal A,\mathcal B) $ in $\operatorname {Mod} R $ if $\mathcal …

Restricted injective dimensions over Cohen-Macaulay rings

M Hrbek, G Le Gros - Algebras and Representation Theory, 2024 - Springer
We show that the small and large restricted injective dimensions coincide for Cohen-
Macaulay rings of finite Krull dimension. Based on this, and inspired by the recent work of …

[PDF][PDF] Module classes induced by complexes and λ-pure-injective modules

M Cortés-Izurdiaga, J Šaroch - arXiv preprint arXiv:2104.08602, 2021 - researchgate.net
We prove that, if GProj is the class of all Gorenstein projective modules over a ring R, then
GP=(GProj, GProj⊥) is a cotorsion pair. Moreover, GP is complete when all projective …

Finitely generated cotorsion modules

EE Enochs, JRG Rozas, L Oyonarte - Proceedings of the Edinburgh …, 2001 - cambridge.org
We describe the structure of finitely generated cotorsion modules over commutative
noetherian rings. Also we characterize the so-called covering morphisms between finitely …

[HTML][HTML] Cotorsion pairs, torsion pairs, and Σ-pure-injective cotilting modules

R Colpi, F Mantese, A Tonolo - Journal of Pure and Applied Algebra, 2010 - Elsevier
In this paper we study cotorsion and torsion pairs induced by cotilting modules. We prove
the existence of a strong relationship between the Σ-pure-injectivity of the cotilting module …

Cotorsion pairs generated by modules of bounded projective dimension

S Bazzoni, D Herbera - arXiv preprint arXiv:0707.2026, 2007 - arxiv.org
We apply the theory of cotorsion pairs to study closure properties of classes of modules with
finite projective dimension with respect to direct limit operations and to filtrations. We also …

Selforthogonal modules with finite injective dimension III

Z Huang - Algebras and representation theory, 2009 - Springer
Let R be a left Noetherian ring, S a right Noetherian ring and RU a generalized tilting
module with S= End (RU). We give some equivalent conditions that the injective dimension …