| 摘要: |
| 在半对偶模的基础上,针对一个模的GC--投射性在环的优越扩张下是保持的,在已知结论正确的情况下采用不同于以往的证明方法,利用模的GC--投射性的等价命题证明主要结论,即对于环的优越扩张R→S和S-模SM,R--模RM是一个GC--投射模当且仅当SM是一个GSRC-投射模。使用等价命题后采用的新证明方法逻辑清晰,形式统一,便于模的具体相关性质的推广与应用。 |
| 关键词: 半对偶模 GC--投射模 优越扩张 |
| DOI: |
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| GC-projective Modules under Excellence Extension |
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ZHOU Jun, HU Yue, GE Mao-rong
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School of Mathematical Sciences, Anhui University,Hefei 230601, China
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| Abstract: |
| We know that the Gorenstein projectivity relative to a semidualizing module is preserved under excellent extensions. A new method of proof is adopted when the conclusion is known to be correct. Using the equivalent proposition of the definition to prove that for an excellent extension R→S and an S-module SM,RMisGC projective module if and only ifSM isGSRCprojective module. The form of the new method after using equivalent proposition is uniform. It is convenient to generalize and apply the related properties of modules. |
| Key words: semidualizing modules GC-projective modules excellent extensions |