引入覆盖空间，定义了其邻域、内部、闭包、测度等概念，研究了它们的性质。

In this paper covering space is introduced. The notions, neighborhood, interior, closure and measure, are defined, and the properties of them are studied.

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通过对模糊拟阵的相关性、闭包算子和模糊闭集的研究，得到了模糊闭集和模糊闭包算子的几个重要性质。

Several important properties of fuzzy close sets and fuzzy closure operator are derived by analyzing and investigating relativity, closure operators and fuzzy close sets in the fuzzy matroids.

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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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