The Gorenstein projective modules are precovering
Peter Jorgensen
证明了Gorenstein投射模在具有对偶复形的环的模范畴中构成一个预覆盖类。
The Gorenstein projective modules are proved to form a precovering class in the module category of a ring which has a dualizing complex.
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Let $T$ be a right exact functor from an abelian category $\mathscr{B}$ into another abelian category $\mathscr{A}$. Then there exists a functor ${\bf p}$ from the product category $\mathscr{A}\times\mathscr{B}$ to the comma category $(T\downarrow\mathscr{A})$. In this paper, we study the property of the extension closure of some classes of objects in $(T\downarrow\mathscr{A})$, the exactness of the functor ${\bf p}$ and the detail description of orthogonal classes of a given class ${\bf p}(\mathcal{X},\mathcal{Y})$ in $(T\downarrow\mathscr{A})$. Moreover, we characterize when special precover…
We prove that Vopěnka's Principle implies that for every class $\mathfrak{X}$ of modules over any ring, the class of \textbf{$\boldsymbol{\mathfrak{X}}$-Gorenstein Projective modules} (\textbf{$\boldsymbol{\mathfrak{X}}$-$\boldsymbol{\mathcal{GP}}$}) is a special precovering class. In particular, it is not possible to prove (unless Vopěnka's Principle is inconsistent) that there is a ring over which the \textbf{Ding Projectives} ($\boldsymbol{\mathcal{DP}}$) or the \textbf{Gorenstein Projectives} ($\boldsymbol{\mathcal{GP}}$) do not form a precovering class (Šaroch previously obtained this res…
We prove that, for any $n \geq 2$, the classes of $\rm{FP}_{n}$-injective modules and of $\rm{FP}_n$-flat modules are both covering and preenveloping over any ring $R$. This includes the case of $\rm{FP}_{\infty}$-injective and $\rm{FP}_{\infty}$-flat modules (i.e. absolutely clean and, respectively, level modules). Then we consider a generalization of the class of (strongly) Gorenstein flat modules - the (strongly) Gorenstein AC-flat modules (cycles of exact complexes of flat modules that remain exact when tensored with any absolutely clean module). We prove that some of the properties of Gor…
Stability of projectively coresolved Gorenstein flat modules
本文证明了投射余解Gorenstein平坦模类在定义它们的Gorenstein过程下保持稳定，并给出了其平坦维数的新刻画。
Gorenstein projective dimension for complexes
定义并研究了结合环上左模复形的Gorenstein投射维数的概念。对于有限Gorenstein投射维数的复形，我们定义并研究了Tate上同调理论. Tate上同调群具有到经典Ext群的自然变换。在模块参数的情况下，我们表明，这些地图适合到一个长的确切序列，其中每三项是一个相对上同调群定义的左模块有限Gorenstein投射维数。
Existence of Gorenstein projective resolutions
Gorenstein环对于代数几何等不同的数学领域都很重要，它们通过模型类别的概念编码有关空间奇异性和同伦理论的信息。因此，Gorenstein环的研究导致了同调代数的一个完整分支的出现，称为Gorenstein同调代数。本文解决了Gorenstein同调代数的一个公开问题，证明了在相当一般的环上存在所谓的Gorenstein投射分解，从而使导出函子的Gorenstein版本的定义成为可能。给出了Tate上同调理论的一个应用。
Gorenstein projective dimension with respect to a semidualizing module
在交换环上引入并研究了$\gc$ -投射模的概念，其中$C$是半对偶模.这将Holm和Jørgensen的$C$ -Gorenstein投射模的概念扩展到非诺特的设置，并在此设置内推广投射和Gorenstein投射模。然后，我们研究有限$\gc$ -投射维数的模，特别是，他们承认$\gc$ -投射近似，推广的最大科恩-麦考利近似Auslander和Buchweitz。在局部（Noether）环上，我们给出了$G_C$ -逼近为极小的充要条件.
Stability of Gorenstein Categories
我们表明，迭代的程序用于定义Gorenstein投射模在交换环$R$产生的Gorenstein投射模。具体地说，给定Gorenstein投射$R$ -模块$G=...\xra{\partial^G_2}G_1\xra{\partial^G_1}G_0\xra{\partial^G_0} ...$的精确序列，使得复合物$\Hom_R(G,H)$和$\Hom_R(H,G)$对于每个Gorenstein投射$R$ -模块$H$是精确的，模块$\coker(\partial^G_1)$是Gorenstein投射的。这个结果的证明依赖于我们对阿贝尔范畴的Gorenstein子范畴的分析。
Strongly $FP$-injective dimensions and Gorenstein projective precovers
本文研究了格伦斯坦投射预覆盖的存在性及完备性问题，通过开发的工具验证了格伦斯坦对称猜想，并探讨了 $\mathrm{silp}(R)$ 与 $\mathrm{spli}(R)$ 的有限性关系。
(projectively coresolved) Gorenstein flat modules over tensor rings
本文针对张量环结构，刻画了其上的投射余分解Gorenstein平坦模的等价判定条件，明确描述了一类相关平坦模，并给出了其在两类环结构上的应用。
Quasi-projective dimension and Gorenstein projective dimension
本文从 Gorenstein 同调代数角度研究拟投射维数，证明其在特定条件下与 Gorenstein 投射维数一致，并引入拟 Gorenstein 投射维数作为其类比。
On Gorenstein Projective, Injective and Flat Dimensions - A Functorial Description with Applications
Gorenstein同调维数是经典同调维数的改进，有限性挑选出具有反映Gorenstein环上模的顺从性质的模。相对于他们的经典同行，这些尺寸不立即与实际和强大的有限性标准，甚至没有交换诺特局部环。在本文中，我们扩大类环已知承认良好的标准有限的Gorenstein尺寸：它现在包括，例如，遇到的环交换代数几何，并在非交换领域，$k$ -代数与对偶复杂。
Let A be an artin algebra. An A-module M is semi-Gorenstein-projective provided that Ext^i(M,A) = 0 for all i > 0. If M is Gorenstein-projective, then both M and its A-dual M* are semi-Gorenstein projective. As we have shown recently, the converse is not true, thus answering a question raised by Avramov and Martsinkovsky. The aim of the present note is to analyse in detail the modules M such that both M and M* are semi-Gorenstein-projective.
We give a result of Auslander-Ringel-Tachikawa type for Gorenstein-projective modules over a complete Gorenstein order. In particular, we prove that a complete Gorenstein order is of finite Cohen-Macaulay representation type if and only if every indecomposable pure-injective object in the stable category of Gorenstein-projective modules is compact.
Noncommutative Gorenstein Projective Schemes and Gorenstein-Injective Sheaves
证明了若正分次环$R$是Gorenstein范畴且相应的扭函子具有有限上同调维数，则相应的非交换射影概形${\rm Tails}(R)$是\cite{EEG}意义下的Gorenstein范畴.在此条件下，给出了${\rm Tails}(R)$中Gorenstein-内射层与（分次）Gorenstein-内射$R$ -模之间的（右）关系.
In this paper, we mainly investigate the $\mathfrak{X}$-Gorenstein projective dimension of modules and the (left) $\mathfrak{X}$-Gorenstein global dimension of rings. Some properties of $\mathfrak{X}$-Gorenstein projective dimensions are obtained. Furthermore, we prove that the (left) $\mathfrak{X}$-Gorenstein global dimension of ring $R$ is equal to the supremum of the set of $\mathfrak{X}$-Gorenstein projective dimensions of all cyclic (left) $R$-modules. This result extends the well-known Auslander's theorem on the global dimension and its Gorenstein homological version.
In this paper, we are concerned with Gorenstein projective objects in homotopy categories. Specifically, we present a characterization on Gorenstein projective objects in the category of complexes. Using this result, it is proved that the category of Gorenstein projective objects is a compactly generated triangulated category and an equivalence of triangulated categories is also given over some reasonably nice rings.
Let $R$ be a ring. It is proved that $(\mathcal{GP}(R), \mathcal{GP}(R)^\bot)$ is a complete hereditary cotorsion pair, where $\mathcal{GP}(R)$ denotes the class of the Gorenstein projective left $R$-modules. Then we get that each left $R$-module has a special Gorenstein projective precover. As an application, we prove that all Gorenstein projective left $R$-modules are Gorenstein flat over left noetherian rings.
Finiteness criteria for Gorenstein flat dimension and stability
该研究针对Gorenstein投射模与平坦模关系不明的问题，证明了有限Gorenstein平坦维数模为投射预解式Gorenstein平坦模或有限平坦维数的充要条件，并建立了该类模的稳定性结果。
Let $(\mathcal{A,B})$ be a complete and hereditary cotorsion pair in the category of left $R$-modules. In this paper, the so-called Gorenstein projective complexes respect to the cotorsion pair $(\mathcal{A}, \mathcal{B})$ are introduced. We show that these complexes are just the complexes of Gorenstein projective modules respect to the cotorsion pair $(\mathcal{A}, \mathcal{B})$. As applications, we prove that both Gorenstein projective modules with respect to cotorsion pairs and Gorenstein projective complexes with respect to cotorsion pairs possess of stability.
In this paper, we study the relative homological dimension based on the class of projectively coresolved Gorenstein flat modules (PGF-modules), that were introduced by Saroch and Stovicek. The resulting PGF-dimension of modules has several properties in common with the Gorenstein projective dimension, the relative homological theory based on the class of Gorenstein projective modules. In particular, there is a hereditary Hovey triple in the category of modules of finite PGF-dimension, whose associated homotopy category is triangulated equivalent to the stable category of PGF-modules. Studying …
In this paper, we prove that Gorenstein projective conjecture is left and right symmetric and the co-homology vanishing condition can not be reduced in general. Moreover, the Gorenstein projective conjecture is proved to be true for CM-finite algebras.
An A-module M will be said to be semi-Gorenstein-projective provided that Ext^i(M,A) = 0 for all i > 0. All Gorenstein-projective modules are semi-Gorenstein-projective and only few and quite complicated examples of semi-Gorenstein-projective modules which are not Gorenstein-projective have been known. The aim of the paper is to provide conditions on A such that all semi-Gorenstein-projective modules are Gorenstein-projective (we call such an algebra left weakly Gorenstein). In particular, we show that in case there are only finitely many isomorphism classes of indecomposable left modules whic…
This paper is a continuation of the papers J. Pure Appl. Algebra, 210 (2007), 437--445 and J. Algebra Appl., 8 (2009), 219--227. Namely, we introduce and study a doubly filtered set of classes of modules of finite Gorenstein projective dimension, which are called $(n,m)$-strongly Gorenstein projective ($(n,m)$-SG-projective for short) for integers $n\geq 1$ and $m\geq 0$. We are mainly interested in studying syzygies of these modules. As consequences, we show that a module $M$ has Gorenstein projective dimension at most $m$ if and only if $M\oplus G$ is $(1,m)$-SG-projective for some Gorenstei…
Some Remarks on Gorenstein Projective Precovers
本文针对任意环上Gorenstein投射预覆盖的存在性开放问题，通过三种技术研究相对Gorenstein投射模类，获得遗传余挠对与Hovey三元组，并利用约化性质探讨了与Auslander类相关的模类。
In this paper, we study the relation between $m$-strongly Gorenstein projective (resp. injective) modules and $n$-strongly Gorenstein projective (resp. injective) modules whenever $m \neq n$, and the homological behavior of $n$-strongly Gorenstein projective (resp. injective) modules. We introduce the notion of $n$-strongly Gorenstein flat modules. Then we study the homological behavior of $n$-strongly Gorenstein flat modules, and the relation between these modules and $n$-strongly Gorenstein projective (resp. injective) modules.
The principle "Every result in classical homological algebra should have a counterpart in Gorenstein homological algebra" is given in [3]. There is a remarkable body of evidence supporting this claim (cf. [2] and [3]). Perhaps one of the most glaring exceptions is provided by the fact that tensor products of Gorenstein projective modules need not be Gorenstein projective, even over Gorenstein rings. So perhaps it is surprising that tensor products of Gorenstein injective modules over Gorenstein rings of finite Krull dimension are Gorenstein injective. Our main result is in support of the princ…
In this article we investigate the relations between the Gorenstein projective dimensions of $Λ$-modules and their socles for minimal n-Auslander-Gorenstein algebras $Λ$ in the sense of Iyama and Solberg \cite{IS}. First we give a description of projective-injective $Λ$-modules in terms of their socles. Then we prove that a $Λ$-module $N$ has Gorenstein projective dimension at most n iff its socle has Gorenstein projective dimension at most n iff $N$ is cogenerated by a projective $Λ$-module. Furthermore, we show that minimal n-Auslander-Gorenstein algebras can be characterised by the relation…
Let $\mathcal{A}$ and $\mathcal{B}$ be abelian categories and $\mathbf{F}:\mathcal{A}\to \mathcal{B}$ an additive and right exact functor which is perfect, and let $(\mathbf{F},\mathcal{B})$ be the left comma category. We give an equivalent characterization of Gorenstein projective objects in $(\mathbf{F},\mathcal{B})$ in terms of Gorenstein projective objects in $\mathcal{B}$ and $\mathcal{A}$. We prove that there exists a left recollement of the stable category of the subcategory of $(\mathbf{F},\mathcal{B})$ consisting of Gorenstein projective objects modulo projectives relative to the same…
We give necessary and sufficient conditions in order for the class of projectively coresolved Gorenstein flat modules, $\mathcal{PGF}$, (respectively that of projectively coresolved Gorenstein $\mathcal{B}$ flat modules, $\mathcal{PGF}_{\mathcal{B}}$) to coincide with the class of Ding projective modules ($\mathcal{DP})$. We show that $\mathcal{PGF} = \mathcal{DP}$ if and only if every Ding projective module is Gorenstein flat. This is the case if the ring $R$ is coherent for example. We include an example to show that the coherence is a sufficient, but not a necessary condition in order to ha…
Cotorsion pairs, thick subcategories, and finitely generated Gorenstein projective modules
在Cohen-Macaulay环上的诺特代数上，证明有限生成Gorenstein投射模构成遗传cotorsion对的左半部分，并回答Takahashi的问题，刻画左弱Gorenstein性质。
Virtually Gorenstein Artin algebras are weakly Gorenstein
该研究证明虚拟Gorenstein Artin代数上的半Gorenstein投射模均为Gorenstein投射模，解答了相关学者的问题，还验证了多个Gorenstein相关猜想对这类代数成立，并建立了判定模维数的新准则。
Let $R$ be any ring with identity and Ch($R$) the category of chain complexes of (left) $R$-modules. We show that the Gorenstein AC-projective chain complexes are the cofibrant objects of an abelian model structure on Ch($R$). The model structure is cofibrantly generated and is projective in the sense that the trivially cofibrant objects are the categorically projective chain complexes. We show that when $R$ is a Ding-Chen ring, that is, a two-sided coherent ring with finite self FP-injective dimension, then the model structure is finitely generated, and so its homotopy category is compactly g…
Mittag-Leffler Conditions, Gorenstein Modules and Homological Invariants
本文通过集合论方法研究Mittag-Leffler条件的性质，证明强ℵ₁-表现模的归属结论，得出ℵ₁-生成的强Gorenstein投射模为Gorenstein平坦的推论，研究平坦Gorenstein投射模的投射性，并对双侧ℵ₁-凝聚环R证明同调不变量等式。
We classify indecomposable non-projective Gorenstein-projective modules over a monomial algebra via the notion of perfect paths. We apply this classification to a quadratic monomial algebra and describe explicitly the stable category of its Gorenstein-projective modules.
Gorenstein homological properties of n-trivial extensions of rings
本文研究环的 n-平凡扩张上的 Gorenstein 投射、内射和平坦模，给出投射模的等价刻画，并应用于张量环。
Gorenstein modules and dimension over large families of infinite groups
该研究刻画了大族无限群的群代数上的三类Gorenstein模，证明弱Gorenstein模与对应Gorenstein模的等价性，得到有限Gorenstein弱整体维数交换环上的相关结论，并确定了特定群的Gorenstein同调维数。
We establish relations between Gorenstein projective precovers linked by Frobenius functors. This is motivated by an open problem that how to find general classes of rings for which modules have Gorenstein projective precovers. It is shown that if $F:\C\rightarrow\D$ is a separable Frobenius functor between abelian categories with enough projective objects, then every object in $\C$ has a Gorenstein projective precover provided that every object in $\D$ has a Gorenstein projective precover. This result is applied to separable Frobenius extensions and excellent extensions.
$\mathcal{X}$-Gorenstein projective and $\mathcal{Y}$-Gorenstein injective modules over tensor rings
本文研究了张量环上$\mathcal{X}$-Gorenstein投射和$\mathcal{Y}$-Gorenstein注入模的性质，并给出了相关模的特征化结果及应用。
We prove that a certain eventually homological isomorphism between module categories induces a triangle equivalence between their singularity categories, Gorenstein defect categories and the stable categories of Gorenstein projective modules. Further, we show that Auslander-Reiten conjecture and Gorenstein symmetry conjecture can be reduced by eventually homological isomorphisms. Applying the results to arrow removal and vertex removal, we describe the Gorenstein projective modules over some non-monomial algebras, and we verify the Auslander-Reiten conjecture for certain algebras.
An Auslander-type result for Gorenstein-projective modules
一个Artin代数$A$称为CM-有限的，如果在同构之前，只存在1/2个不可分解的生成的Gorenstein-投射$A$ -模.证明了Gorenstein-artin代数是CM-有限的当且仅当它的每个Gorenstein-投射模都是N-生成的Gorenstein-投射模的直和.这是一个类似的Auslander定理代数有限表示型（\cite{A,A1}）。
A Gordon--Green-type result for Gorenstein-projective modules
针对Z-分次Iwanaga-Gorenstein Artin代数，证明其CM有限性等价于可分次Gorenstein投射模范畴有限型或不可分解该类模长度有界，且CM有限时所有Gorenstein投射模均可分次，为Gordon-Green定理提供了Gorenstein投射类比。
Let $T=\left( \begin{array}{cc} R & M 0 & S \end{array} \right) $ be a triangular matrix ring with $R$ and $S$ rings and $_RM_S$ an $R$-$S$-bimodule. We describe Gorenstein projective modules over $T$. In particular, we refine a result of Enochs, Cortés-Izurdiaga and Torrecillas [Gorenstein conditions over triangular matrix rings, J. Pure Appl. Algebra 218 (2014), no. 8, 1544-1554]. Also, we consider when the recollement of $\mathbb{D}^b(T{\text-} Mod)$ restricts to a recollement of its subcategory $\mathbb{D}^b(T{\text-} Mod)_{fgp}$ consisting of complexes with finite Gorenstein projective di…
The aim of this note is to outline the structure of the category of the Gorenstein projective modules for a Nakayama algebra. We are going to introduce the resolution quiver of such an algebra. It provides a fast algorithm in order to obtain the Gorenstein projective modules and to decide whether the algebra is a Gorenstein algebra or not, and whether it is CM-free or not.
We generalize the monomorphism category from quiver (with monomial relations) to arbitrary finite dimensional algebras by a homological definition. Given two finite dimension algebras $A$ and $B$, we use the special monomorphism category Mon(B, A-Gproj) to describe some Gorenstein projective bimodules over the tensor product of $A$ and $B$. If one of the two algebras is Gorenstein, we give a sufficient and necessary condition for Mon(B, A-Gproj) being the category of all Gorenstein projective bimodules. In addition, If both $A$ and $B$ are Gorenstein, we can describe the category of all Gorens…
From certain triangle functors, called non-negative functors, between the bounded derived categories of abelian categories with enough projective objects, we introduce their stable functors which are certain additive functors between the stable categories of the abelian categories. The construction generalizes a previous work by Hu and Xi. We show that the stable functors of non-negative functors have nice exactness property and are compatible with composition of functors. This allows us to compare conveniently the homological properties of objects linked by the stable functors. Particularly, …
We show that a differential module is Gorenstein projective if and only if its underlying module is Gorenstein projective. Dually, a differential module is Gorenstein injective if and only if its underlying module is Gorenstein injective.
Relative Singularity Categories and Gorenstein-Projective Modules
引入了关于阿贝尔范畴的自正交子范畴$ω$的相对奇异范畴的概念。引入了$ω$ -Cohen-Macaulay对象的Frobenius范畴，并在一定条件下证明了$ω$ -Cohen-Macaulay对象的稳定范畴与相对奇异范畴是三角等价的.作为应用，我们将Gorenstein-投射模的稳定范畴与环的奇异范畴联系起来.证明了Gorenstein环的Gorenstein-投射模的稳定范畴是紧生成的，并且它的紧对象与有限生成的Gorenstein-投射模在直和项下一致.
On classical and Gorenstein homological invariants of rings
本文证明任意环R上平坦左R-模的投射维数上确界等于Gorenstein平坦左R-模的Gorenstein投射维数上确界，由此得到左n-完全环的新刻画，并引入经典同调不变量的Gorenstein类比，研究其关系，最后给出左弱n-Σ-余挠环的Gorenstein类刻画。
We introduce what is meant by an AC-Gorenstein ring. It is a generalized notion of Gorenstein ring which is compatible with the Gorenstein AC-injective and Gorenstein AC-projective modules of Bravo-Gillespie-Hovey. It is also compatible with the notion of $n$-coherent rings introduced by Bravo-Perez: So a $0$-coherent AC-Gorenstein ring is precisely a usual Gorenstein ring in the sense of Iwanaga, while a $1$-coherent AC-Gorenstein ring is precisely a Ding-Chen ring. We show that any AC-Gorenstein ring admits a stable module category that is compactly generated and is the homotopy category of …
Gorenstein projective, injective and flat modules over trivial ring extensions
本文通过引入广义相容与广义余相容双模，给出了平凡环扩张上Gorenstein投射、内射和平坦模的显式刻画，并应用于具有零双模同态的Morita context环。
Let $Λ$ be the path algebra of a finite quiver $Q$ over a finite-dimensional algebra $A$. Then $Λ$-modules are identified with representations of $Q$ over $A$. This yields the notion of monic representations of $Q$ over $A$. If $Q$ is acyclic, then the Gorenstein-projective $\m$-modules can be explicitly determined via the monic representations. As an application, $A$ is self-injective if and only if the Gorenstein-projective $\m$-modules are exactly the monic representations of $Q$ over $A$.
Let $\mathcal{A}$ be an abelian category. For a pair $(\mathcal{X},\mathcal{Y}$ of classes of objects in $\mathcal{A},$ we define the weak and the $(\mathcal{X},\mathcal{Y})$-Gorenstein relative projective objects in $\mathcal{A}$. We point out that such objects generalize the usual Gorenstein projective objects and others generalizations appearing in the literature as Ding-projective, Ding-injective, $\mathcal{X}$-Gorenstein projective, Gorenstein AC-projective and $G_C$-projective modules and Cohen-Macaulay objects in abelian categories. We show that the principal results on Gorenstein proje…
Under semi-weak and weak compatibility of bimodules, we establish sufficient and necessary conditions of Gorenstein-projective modules over rings of Morita contexts with one bimodule homomorphism zero. This generalises and extends results on triangular matrix Artin algebras and on Artin algebras of Morita contexts with two bimodule homomorphisms zero in the literature, where only sufficient conditions are given under a strong assumption of compatibility of bimodules. An application is provided to describe Gorenstein-projective modules over noncommutative tensor products arising from Morita con…
Endomorphism algebras of Gorenstein-projective modules over string algebras
本文研究弦代数上Gorenstein-投射模的自同态代数，通过G-条件下构造平铺曲面模型，并证明表示有限型等价于所有基本Gorenstein-投射模的自同态代数表示有限。
Applications of Gorenstein projective $τ$-rigid modules
本文引入 $CM$-$\ au$-倾斜自由代数并研究其同调性质，通过等价关系建立 Gorenstein 投射 $\ au$-刚性模与某些模的双射，并部分解决了 Tachikawa 第一猜想。
It is a well-known result of Auslander and Reiten that contravariant finiteness of the class $\mathcal{P}^{\mathrm{fin}}_\infty$ (of finitely generated modules of finite projective dimension) over an Artin algebra is a sufficient condition for validity of finitistic dimension conjectures. Motivated by the fact that finitistic dimensions of an algebra can alternatively be computed by Gorenstein projective dimension, in this work we examine the Gorenstein counterpart of Auslander--Reiten condition, namely contravariant finiteness of the class $\mathcal{GP}^{\mathrm{fin}}_\infty$ (of finitely gen…
We consider a finite acyclic quiver $\mathcal{Q}$ and a quasi-Frobenius ring $R$. We endow the category of quiver representations over $R$ with a model structure, whose homotopy category is equivalent to the stable category of Gorenstein-projective modules over the path algebra $R\mathcal{Q}$. As an application, we then characterize Gorenstein-projective $R\mathcal{Q}$-modules in terms of the corresponding quiver $R$-representations; this generalizes a result obtained by Luo-Zhang to the case of not necessarily finitely generated $R\mathcal{Q}$-modules, and partially recover results due to Eno…
One-sided Gorenstein rings
本文证明Iwanaga--Gorenstein环的若干特征可推广至单侧情形，无需诺特假设，并在Gorenstein整体维数、模维数上确界及有限维数间建立新关系。
How to construct Gorenstein projective modules relative to complete duality pairs over Morita rings
该研究针对满足特定张量零化条件的Morita环，利用两侧环的（完全）对偶对构造环上模的（完全）对偶对，推广了三角矩阵环上的相关结果，并构造了对应完全对偶对的Gorenstein投射模，给出了在Ding投射模中的应用。
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