并且生成r的自反闭包、对称闭包和传递闭包。

And generate Rs reflexive closure, symmetric closure and transitive closure.

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本文引入有向图的特征多项式、反图、对称闭包等概念。初步探讨它们与图的某些整体性质的关系。

In this paper, the concept of the characteristic polynomial, the converse graph, the symmetrical closure and others are defined.

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本文定义了模糊关系的自反闭包、对称闭包概念，同时给出了模糊关系的自反闭包、对称闭包的运算方法及性质。 打破了在原有的模糊关系只有传递闭包的局面。

This paper gives a new concept of reflexive closure of fuzzy relation and symmetric closure of fuzzy relation, and also gives operation method and properties about it.

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