... 无因子的理想子环 divisorless ideal 零因子 divisors of zero 十二边形 dodecagon ...
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The structures of a kind of algebras which contain left zero-divisors are characterized, and the problem advanced in Wu Pinshan's work ls solved.
刻划了一类含左零因子的代数的结构，解决了己有文献提出的问题。
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