论文信息 - On Direct Sums of Lifting Modules and Internal Exchange Property - 字舞流文

On Direct Sums of Lifting Modules and Internal Exchange Property

Let R be a ring with identity and let be an amply supplemented R-module. Then it is proved that has () and is for , i = 1, 2, if and only if for any coclosed submodule X of M, there exist and such that .

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