关于PVMD的一些刻画
Keywords: wˉ平坦模 ,wˉ投射模 ,PVMD ,wˉ理想
Abstract:
证明了R是PVMD当且仅当每个无挠Rˉ模是wˉ平坦模,当且仅当每个有限生成无挠Rˉ模是wˉ投射模.讨论了PVMD的环扩张与PVMD中的素wˉ理想的性质.特别地,对于PVMD中的素wˉ理想p,给出了其是分支的一些等价刻画,得到p是分支的当且仅当存在一个wˉ理想I≠p,使得p=I,当且仅当p是一个主理想上的极小素理想.
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