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arXiv 2103.14240math.AC
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$S$ -凝聚环的新刻画

New Characterizations of $S$-coherent rings

Wei Qi, Xiaolei Zhang, Wei Zhao

摘要:

本文引入并研究了$S$ -Mittag-Leffler模关于所有平坦模的类$S$ - $\mathcal{F}$ -ML.证明了环$R$是$S$ -凝聚的当且仅当$S$ - $\mathcal{F}$ -ML在子模下闭.作为应用,我们得到Chase定理的$S$ -版本:环$R$是$S$ -凝聚的当且仅当$R$的直积是$S$ -平坦的当且仅当平坦$R$ -模的直积是$S$ -平坦的.因此,我们对D. Bennis和M. El Hajoui [3].

英文摘要:

In this paper, we introduce and study the class $S$-$\mathcal{F}$-ML of $S$-Mittag-Leffler modules with respect to all flat modules. We show that a ring $R$ is $S$-coherent if and only if $S$-$\mathcal{F}$-ML is closed under submodules. As an application, we obtain the $S$-version of Chase Theorem: a ring $R$ is $S$-coherent if and only if any direct product of $R$ is $S$-flat if and only if any direct product of flat $R$-modules is $S$-flat. Consequently, we provide an answer to the open question proposed by D. Bennis and M. El Hajoui [3].

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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