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- W2952525130 abstract "In this paper, we introduce and study the concept of CS-Rickart modules, that is a module analogue of the concept of ACS rings. A ring $R$ is called a right weakly semihereditary ring if every its finitly generated right ideal is of the form $Poplus S,$ where $P_R$ is a projective module and $S_R$ is a singular module. We describe the ring $R$ over which $mathrm{Mat}_n (R)$ is a right ACS ring for any $n in mathbb {N}$. We show that every finitely generated projective right $R$-module will to be a CS-Rickart module, is precisely when $R$ is a right weakly semihereditary ring. Also, we prove that if $R$ is a right weakly semihereditary ring, then every finitely generated submodule of a projective right $R$-module has the form $P_{1}oplus ldotsoplus P_{n}oplus S$, where every $P_{1}, ldots, P_{n}$ is a projective module which is isomorphic to a submodule of $R_{R}$, and $S_R$ is a singular module. As corollaries we obtain some well-known properties of Rickart modules and semihereditary rings." @default.
- W2952525130 created "2019-06-27" @default.
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- W2952525130 date "2014-06-15" @default.
- W2952525130 modified "2023-09-27" @default.
- W2952525130 title "CS-Rickart modules" @default.
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