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arXiv 1710.04420math.RT
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关于Nakayama代数同调维数的界

On bounds of homological dimensions in Nakayama algebras

Dag Oskar Madsen, Rene Marczinzik

摘要:

设$A$是一个具有$n$单模和一个偶数投射维数$m$的单模$S$的Nakayama代数.选取$m$极小,使得存在一个具有投射维数$2m$的简单$A$ -模,证明了$A$的整体维数是由$n+m-1$有界的.这给出了Gustafson \cite{Gus}和Madsen \cite{Mad}结果的综合概括。在\cite{Bro}中,Brown证明了具有$n$单模的拟遗传Nakayama代数的整体维数由$n$有界.利用我们关于Nakayama代数的整体维数的界的结果,我们给出了这个结果的一个简短的新证明,并将Brown的结果从拟遗传的推广到标准分层的Nakayama代数,其中整体维数用有限维数代替.

英文摘要:

Let $A$ be a Nakayama algebra with $n$ simple modules and a simple module $S$ of even projective dimension $m$. Choose $m$ minimal such that a simple $A$-module with projective dimension $2m$ exists, then we show that the global dimension of $A$ is bounded by $n+m-1$. This gives a combined generalisation of results of Gustafson \cite{Gus} and Madsen \cite{Mad}. In \cite{Bro}, Brown proved that the global dimension of quasi-hereditary Nakayama algebras with $n$ simple modules is bounded by $n$. Using our result on the bounds of global dimensions of Nakayama algebras, we give a short new proof of this result and generalise Brown's result from quasi-hereditary to standardly stratified Nakayama algebras, where the global dimension is replaced with the finitistic dimension.

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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