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arXiv 1911.11331math.RA
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对象-单位广群分次模

Object-unital groupoid graded modules

Juan Cala, Patrik Lundström, Héctor Pinedo

摘要:

在以前的文章中(参见\cite{CNP}),我们引入并分析了对象单位$\mathcal{G}$ -分次环$R$的环论性质,其中$\mathcal{G}$是广群.本文研究了这类环上酉$\G$ -分次模范畴$\grmod$.根据\cite{lundstrom2004}中的一位作者早先提出的想法,我们分析了遗忘函子$U \colon \grmod \to \rmod$,并旨在确定以下含义对$\grmod$中的模块$M$有效的属性$\mathcal{P}$:$M$是$\mathcal{P}$ $\Rightarrow$ $U(M)$是$\mathcal{P}$ ; $U(M)$是$\mathcal{P}$ $\Rightarrow$ $M$是$\mathcal{P}$。在这里,我们处理的情况下,当$\mathcal{P}$是任何性质:直接和,投射,内射,自由,简单和半单。此外,还建立了经典模理论的分次版本的结果,以及与范畴$\grmod$相关的一些结构性质。

英文摘要:

In a previous article (see \cite{CNP}), we introduced and analyzed ring-theoretic properties of object unital $\mathcal{G}$-graded rings $R$, where $\mathcal{G}$ is a groupoid. In the present article, we analyze the category $\grmod$ of unitary $\G$-graded modules over such rings. Following ideas developed earlier by one of the authors in \cite{lundstrom2004}, we analyze the forgetful functor $U \colon \grmod \to \rmod$ and aim to determine properties $\mathcal{P}$ for which the following implications are valid for modules $M$ in $\grmod$: $M$ is $\mathcal{P}$ $\Rightarrow$ $U(M)$ is $\mathcal{P}$; $U(M)$ is $\mathcal{P}$ $\Rightarrow$ $M$ is $\mathcal{P}$. Here we treat the cases when $\mathcal{P}$ is any of the properties: direct summand, projective, injective, free, simple and semisimple. Moreover, graded versions of results concerning classical module theory are established, as well as some structural properties related to the category $\grmod$.

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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