... right homotopy inverse 右同伦逆元 right ideal 右理想 right identity element 右幺元 ...
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给出满足主右理想极小条件诣零环的两个充要条件，此类环是扩张闭的。
This peper gives two necessary and sufficient conditions for a ring to be a nil MHR-ring. It is obtained that any nil MHR-ring is extension closed.
引入了右理想和理想bci—代数的概念，通过对它们的讨论，得到了一些基本性质。
The concepts of right ideal and ideal BCI-algebra are introduced and some characters are discussed.
研究了每一个极大的右理想是拟理想的右SF -环的正则性，得到了右SF -环是正则环的一些新的刻画，推广了一些已知的结论。
We study the regularity of right SF-rings whose every maximal right ideal is a quasi-ideal. Some new characterizations on the regularity of right SF-rings are obtained, which generalize some results.
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