Mathematics and Physics

Auslander conditions and cotilting-like cotorsion pairs

  • WU De-jun ,
  • LIU Zhi-yang
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  • School of Science, Lanzhou University of Technology, Lanzhou 730050, China

Received date: 2023-12-04

  Online published: 2026-09-03

Abstract

Assuming that $\mathscr{AC}$ is the class of left R-modules satisfying the Auslander condition, and $\mathscr{AC}$<∞ represents the left R-module class with finite $\mathscr{AC}$-dimension. The definition of cotilting-like cotorsion pairs is introduced through the definitions of cotilting modules and cotilting cotorsion pairs. With the concepts of Auslander-Gorenstein rings and Auslander-regular rings, there are some equivalent characterizations of cotilting cotorsion pairs and cotilting-like cotorsion pairs induced by $\mathscr{AC}$<∞ on an Artin algebra R that satisfies the Auslander condition. This leads to some criteria for the validity of the Auslander and Reiten conjecture, which says that an Artin algebra satisfying the Auslander condition is Gorenstein.

Cite this article

WU De-jun , LIU Zhi-yang . Auslander conditions and cotilting-like cotorsion pairs[J]. Journal of Lanzhou University of Technology, 2026 , 52(4) : 154 -158 . DOI: 10.13295/j.cnki.issn1673-5196.2026.04.018

References

[1] Bass H.On the ubiquity of gorenstein rings[J].Mathematische Zeitschrift,1963,82(1):8-28.
[2] Auslander M,Reiten I.K-Gorenstein algebras and syzygy modules[J].Journal of Pure and Applied Algebra,1994,92(1):1-27.
[3] Salce L.Cotorsion theories for abelian groups[J].Symposia Mathematica,1979,23:11-32.
[4] Gbel R,Trlifaj J.Approximations and endomorphism algebras of modules[M].Berlin:Walter de Gruyter,2012:99-125.
[5] Moradifar P,Šaroch J.Finitistic dimension conjectures via Gorenstein projective dimension[J].Journal of Algebra,2022,591:15-35.
[6] Wang J,Li Y X,Hu J S.When the kernel of a complete hereditary cotorsion pair is the additive closure of a tilting module[J].Journal of Algebra,2019,530:94-113.
[7] 吴德军,移晨刚.余挠对与余倾斜模[J].兰州理工大学学报,2021,47(5):144-149.
[8] Wang J,Li Y X,Wu J S,et al.Auslander conditions and tilting-like cotorsion pairs[J].Journal of Algebra,2023,635:220-234.
[9] Huang Z Y.On the grade of modules over noetherian rings[J].Communications in Algebra,2008,36(10):3616-3631.
[10] Šaroch J,Štovíček J.Singular compactness and definability for Σ-cotorsion and Gorenstein modules[J].Selecta Mathematica,2020,26(2):23.
[11] Enochs E E,Jenda O M G.Relative homological algebra[M].Berlin:Walter de Gruyter,2000:211-300.
[12] 章璞.三角范畴与导出范畴[M].北京:科学出版社,2015:169-185.
[13] Anderson F W,Fuller K R.Rings and categories of modules[M].New York:Springer Science,2012:312-322.
[14] Emmanouil I.On the finiteness of Gorenstein homological dimensions[J].Journal of Algebra,2012,372:376-396.
[15] Geng Y X,Ding N Q.W-Gorenstein modules[J].Journal of Algebra,2011,325:132-146.
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