At last, we we prove the decomposition and synthetize theorems of general fuzzy rough approximation operator.

最后，给出了广义模糊粗糙近似算子的分解与合成定理。

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This paper discusses the relationships between a fuzzy approximation space and a fuzzy topology space. The approximations and reduction in fuzzy covering-based rough sets are also studied.

本文研究模糊近似空间与模糊拓扑空间之间的关系、基于模糊覆盖的粗糙集模型与约简等问题。

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