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arXiv 2402.17293math.RTmath.CT
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刻画高阶 Auslander(-Gorenstein) 代数

Characterizing higher Auslander(-Gorenstein) Algebras

Zhenhui Ding, Mohammad Hossein Keshavarz, Guodong Zhou

AI总结:

本文利用挠理论方法将经典 Auslander-Tachikawa 定理推广到高阶情形,用投射维数小于 n 的模范畴的 Abel 性质刻画 n-Auslander 代数,并给出高阶 Auslander-Gorenstein 代数的范畴刻画及应用。

摘要:

众所周知,对于 Auslander 代数,所有(有限生成)投射模构成的范畴是 Abel 范畴,并且这一 Abel 性质由 1974 年的 Tachikawa 定理刻画了 Auslander 代数。设 $n$ 为正整数。本文利用挠理论方法证明:$n$-Auslander 代数可以由投射维数小于 $n$ 的模范畴的 Abel 性质以及某个附加性质来刻画,从而推广了经典的 Auslander-Tachikawa 定理。通过 Auslander-Iyama 对应,得到了具有 $n$-cluster tilting 模的 Artin 代数类的范畴刻画。由于高阶 Auslander 代数是高阶 Auslander-Gorenstein 代数的特殊情形,这些结果在更一般的情形下给出,推广了 Kong 先前的结论。此外,作为某些结果的应用,我们给出了 Artin 代数的半单性和自内射性的范畴描述。还从 cotorsion 对的角度研究了高阶 Auslander-Gorenstein 代数,并作为应用证明它们满足两个良好的等价关系。

英文摘要:

It is well known that for Auslander algebras, the category of all (finitely generated) projective modules is an abelian category and this property of abelianness characterizes Auslander algebras by Tachikawa theorem in 1974. Let $n$ be a positive integer. In this paper, by using torsion theoretic methods, we show that $ n $-Auslander algebras can be characterized by the abelianness of the category of modules with projective dimension less than $ n $ and a certain additional property, extending the classical Auslander-Tachikawa theorem. By Auslander-Iyama correspondence a categorical characterization of the class of Artin algebras having $ n $-cluster tilting modules is obtained. Since higher Auslander algebras are a special case of higher Auslander-Gorenstein algebras, the results are given in the general setting as extending previous results of Kong. Moreover, as an application of some results, we give categorical descriptions for the semisimplicity and selfinjectivity of an Artin algebra. Higher Auslander-Gorenstein Algebras are also studied from the viewpoint of cotorsion pairs and, as application, we show that they satisfy in two nice equivalences.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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