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arXiv 2302.04560math.AC
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论$τ_q$-投射性与$τ_q$-单性

On $τ_q$-projectivity and $τ_q$-simplicity

Xiaolei Zhang

AI总结:

本文引入$τ_q$-投射模概念,研究$τ_q$-整体维数在$τ_q$-Noetherian环下的等式关系,并刻画$τ_q$-半单环的多种等价条件。

摘要:

本文首先通过强Lucas模引入并研究了$τ_q$-投射模的概念,随后探究了环$R$的$τ_q$-整体维数$τ_q$-gld$(R)$。我们得到:若$R$是$τ_q$-Noetherian环,则$τ_q$-gld$(R)=τ_q$-gld$(R[x])=$gld$({\rm T}(R[x]))$。最后,我们研究了所有模都是$τ_q$-投射模的环(即$τ_q$-半单环)。特别地,我们证明了环$R$是$τ_q$-半单环当且仅当${\rm T}(R[x])$(或${\rm T}(R)$,或$\ncal{Q}_0(R)$)是半单环,当且仅当$R$是${\rm Min}(R)$有限的约化环,当且仅当每个reg-内射(或半正则内射,或Lucas,或强Lucas)模都是内射模。

英文摘要:

In this paper, we first introduce and study the notion of $τ_q$-projective modules via strongly Lucas modules, and then investigate the $τ_q$-global dimension $τ_q$-\gld$(R)$ of a ring $R$. We obtain that if $R$ is a $τ_q$-Noetherian ring, then $τ_q$-\gld$(R)=τ_q$-\gld$(R[x])=$\gld$({\rm T}(R[x]))$. Finally, we study the rings over which all modules are $τ_q$-projective (i.e., $τ_q$-semisimple rings). In particular, we show that a ring $R$ is a $τ_q$-semisimple ring if and only if ${\rm T}(R[x])$ (or ${\rm T}(R)$, or $\mathcal{Q}_0(R)$) is a semisimple ring, if and only if $R$ is a reduced ring with ${\rm Min}(R)$ finite, if and only if every reg-injective (or semireg-injective, or Lucas, or strongly Lucas) module is injective.

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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