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arxiv: 1108.3381 · v1 · pith:QKCSTIE2new · submitted 2011-08-17 · 🧮 math.RA

A generalization of supplemented modules

classification 🧮 math.RA
keywords supplementedmodulesmodulesubmodulefinitelycalledcharacterizecorollaries
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Let $M$ be a left module over a ring $R$ and $I$ an ideal of $R$. $M$ is called an $I$-supplemented module (finitely $I$-supplemented module) if for every submodule (finitely generated submodule) $X$ of $M$, there is a submodule $Y$ of $M$ such that $X+Y=M$, $X\cap Y\subseteq IY$ and $X\cap Y$ is PSD in $Y$. This definition generalizes supplemented modules and $\delta$-supplemented modules. We characterize $I$-semiregular, $I$-semiperfect and $I$-perfect rings which are defined by Yousif and Zhou [15] using $I$-supplemented modules. Some well known results are obtained as corollaries.

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