On Direct Sums of Extending Modules and
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Katutosi Hanada; Yosuke Kuratomi; Kiyoichi Oshiro
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Article
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2002
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Elsevier Science
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English
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An R-module M is called an extending module, and also called CS, if it satisfies the following full extending property: For any submodule X of M, there exists a direct summand X \* of M, which is an essential extension of X. The concept of this module is a notable property of injective modules, quas