由内射、投射类对Artin半单环的刻划 |
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引用本文: | 杨成利.由内射、投射类对Artin半单环的刻划[J].贵州师范大学学报(自然科学版),1997,15(4):80-82. |
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作者姓名: | 杨成利 |
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作者单位: | 曲阜师范大学成人教育学院 |
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摘 要: | 对内射模类I与投射类P我们证明环R是Artin半单环当且仅当存在一个基数C使每个左R 模是一个类I中的模与一个C 限制ES 模的直和,当且仅当存在一个基数C使每个左R 模是一个类P中的模与一个C 限制ES 模的直和
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关 键 词: | Artin半单环,内射类,投射类 |
CHARACTERIZATION OF ARTINIAN SEMISIMPLE RINGS VIA INJECTIVITY AND PROJECTIVITY CLASSES |
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Abstract: | For an injectivity class I and a projectivity class P,we prove that R is Artinian semisimple if and only if there exists a cardinal c such that every left R module is the direct sum of a module in I and a c limited ES module if and only if there exists a cardinal c such that every left R module is the direct sum of a module in P and a c limited Es module. |
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Keywords: | Artinian Semisimple ring Injectivity classes Projectivity classes |
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