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arXiv 2107.12643math.AC
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关于$ϕ$ - $w$ -平坦模及其同调维数

On $ϕ$-$w$-Flat modules and Their Homological Dimensions

Xiaolei Zhang, Wei Zhao

摘要:

本文引入并研究了$ϕ$ - $w$ -平坦模类,它是$ϕ$ -平坦模和$w$ -平坦模的推广.引入并研究了强$R$-环$ϕ$ -环的$ϕ$-$w$-弱整体维数$ϕ$-$w$-w.gl.dim $(R)$.证明了对强$ϕ$ -环$R$,$ϕ$-$w$-w.gl.dim $(R)=0$当且仅当$w$ - $dim(R)=0$当且仅当$R$是$ϕ$ -von Neumann环.证明了强$ϕ$ -环$R$,$ϕ$-$w$-w.gl.dim $(R)\leq 1$当且仅当$R$的每个非零理想是$ϕ$ - $w$ -平坦的,当且仅当$R$是$ϕ$ -PvMR,当且仅当$R$是PvMR.

英文摘要:

In this paper, we introduce and study the class of $ϕ$-$w$-flat modules which are generalizations of both $ϕ$-flat modules and $w$-flat modules. The $ϕ$-$w$-weak global dimension $ϕ$-$w$-w.gl.dim$(R)$ of a strongly $ϕ$-ring $R$ is also introduced and studied. We show that, for a strongly $ϕ$-ring $R$, $ϕ$-$w$-w.gl.dim$(R)=0$ if and only if $w$-$dim(R)=0$ if and only if $R$ is a $ϕ$-von Neumann ring. It is also proved that, for a strongly $ϕ$-ring $R$, $ϕ$-$w$-w.gl.dim$(R)\leq 1$ if and only if each nonnil ideal of $R$ is $ϕ$-$w$-flat, if and only if $R$ is a $ϕ$-PvMR, if and only if $R$ is a PvMR.

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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