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arXiv 1808.03589math.RA
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多项式代数上Ore扩张的Nakayama自同构

Nakayama automorphisms of Ore extensions over polynomial algebras

Liyu Liu, Wen Ma

摘要:

Nakayama自同构在许多数学分支中起着重要的作用,这些分支通常很难计算。我们计算了多项式代数$R$上任意Ore扩张$R[x; σ, δ]$在任意$n$的$n$变量中的Nakayama自同构$ν$。明确地得到了$ν$的公式。当$σ$不是单位映射时,利用张扭研究了不变量$E^G$,其中$G$是与$σ$同阶的循环群.

英文摘要:

Nakayama automorphisms play an important role in several mathematical branches, which are known to be tough to compute in general. We compute the Nakayama automorphism $ν$ of any Ore extension $R[x; σ, δ]$ over a polynomial algebra $R$ in $n$ variables for an arbitrary $n$. The formula of $ν$ is obtained explicitly. When $σ$ is not the identity map, the invariant $E^G$ is also investigated in term of Zhang's twist, where $G$ is a cyclic group sharing the same order with $σ$.

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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