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arXiv 2102.08775math.RAmath.AC
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关于特殊超表现模的n-弱内射和n-弱平坦模范畴

Category of n-weak injective and n-weak flat modules with respect to special super presented modules

Mostafa Amini, Houda Amzil, Driss Bennis

摘要:

设$R$是环,$n$,$k$是两个非负整数.本文引入了$n$ -弱内射模和$n$ -弱平坦模的概念,并通过特殊超可表示模的概念得到了这类模的一些刻画.我们还研究了两类内容更丰富的模,即$\mathcal{WI}_k^n(R)$和$\mathcal{WF}_k^n(R^{op})$,它们比弱内射和弱平坦维数小于或等于$k$的模的维数大.然后在任意环上研究了$\mathcal{WI}_k^n(R)$和$\mathcal{WF}_k^n(R^{op})$覆盖和预包络的存在性

英文摘要:

Let $R$ be a ring and $n$, $k$ two non-negative integers. In this paper, we introduce the concepts of $n$-weak injective and $n$-weak flat modules and via the notion of special super finitely presented modules, we obtain some characterizations of these modules. We also investigate two classes of modules with richer contents, namely $\mathcal{WI}_k^n(R)$ and $\mathcal{WF}_k^n(R^{op})$ which are larger than that of modules with weak injective and weak flat dimensions less than or equal to $k$. Then on any arbitrary ring, we study the existence of $\mathcal{WI}_k^n(R)$ and $\mathcal{WF}_k^n(R^{op})$ covers and preenvelopes

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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