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arXiv 2103.08883math.RT
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态射范畴中几乎可裂序列的判定

Determination of some almost split sequences in morphism categories

Rasool Hafezi, Hossein Eshraghi

摘要:

几乎分裂序列是Auslander-Reiten理论的核心。本文研究了Artin代数$Λ$的态射范畴中具有某些尾项的几乎可裂序列的结构。首先,我们试图用$Λ$ -模范畴内的Auslander-Reiten平移来解释态射范畴内特定对象的Auslander-Reiten平移,然后利用它们来计算几乎可裂序列.在代数的经典表示论中,几乎可裂序列的中间项的识别是十分重要的。因此,本文的另一部分致力于讨论$Λ$的态射范畴中某些几乎可裂序列的中间。作为应用,我们限制在最后一部分的文件,以自内射代数,并提出了一个结构定理,阐明了之间的联系表示-有限态射类别和Dynkin图。

英文摘要:

Almost split sequences lie in the heart of Auslander-Reiten theory. This paper deals with the structure of almost split sequences with certain ending terms in the morphism category of an Artin algebra $Λ$. Firstly we try to interpret the Auslander-Reiten translates of particular objects in the morphism category in terms of the Auslander-Reiten translations within the category of $Λ$-modules, and then use them to calculate almost split sequences. In classical representation theory of algebras, it is quite important to recognize the midterms of almost split sequences. As such, another part of the paper is devoted to discuss the midterm of certain almost split sequences in the morphism category of $Λ$. As an application, we restrict in the last part of the paper to self-injective algebras and present a structural theorem that illuminates a link between representation-finite morphism categories and Dynkin diagrams.

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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