arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2308.02456math.RAmath.LO
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相对内射模、超稳定性与诺特范畴

Relative injective modules, superstability and noetherian categories

Marcos Mazari-Armida, Jiri Rosicky

AI总结:

本文研究三类封闭模类的$\boldsymbol{\text{mathcal{M}}}$-内射模的类贝尔准则,用模型论稳定独立关系论证,证明超稳定性等价于诺特范畴,并以此刻画多种环类。

摘要:

我们研究对直和、$\boldsymbol{\text{mathcal{M}}}$-子模与$\boldsymbol{\text{mathcal{M}}}$-满同态像封闭的模类,其中$\boldsymbol{\text{mathcal{M}}}$为嵌入类、$RD$-嵌入类或纯嵌入类。我们证明这类模的$\boldsymbol{\text{mathcal{M}}}$-内射模满足类贝尔准则,具体而言,内射模、$RD$-内射模、纯内射模、平坦余挠模与$\boldsymbol{\text{mathfrak{s}}}$-挠纯内射模均满足该准则。论证采用模型论方法,关键使用了将Shelah的非分叉推广到抽象初等类的稳定独立关系。我们证明对这些模类而言,经典模型论的超稳定性概念等价于诺特范畴的代数概念,并利用该等价性通过超稳定性刻画了诺特环、纯半单环、完全环以及有限环与阿廷赋值环的有限积。

英文摘要:

We study classes of modules closed under direct sums, $\mathcal{M}$-submodules and $\mathcal{M}$-epimorphic images where $\mathcal{M}$ is either the class of embeddings, $RD$-embeddings or pure embeddings. We show that the $\mathcal{M}$-injective modules of theses classes satisfy a Baer-like criterion. In particular, injective modules, $RD$-injective modules, pure injective modules, flat cotorsion modules and $\mathfrak{s}$-torsion pure injective modules satisfy this criterion. The argument presented is a model theoretic one. We use in an essential way stable independence relations which generalize Shelah's non-forking to abstract elementary classes. We show that the classical model theoretic notion of superstability is equivalent to the algebraic notion of a noetherian category for these classes. We use this equivalence to characterize noetherian rings, pure semisimple rings, perfect rings and finite products of finite rings and artinian valuation rings via superstability.

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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