根据模糊目标函数与模糊约束函数的关系，模糊优化问题可以分为对称和非对称两种类型。
According to the relations between the objective function and the constraint function, the fuzzy optimization can fall into tow categories about symmetry and unsymmetry.
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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