本文在LF双拓扑空间中给出双-（半-）良紧集的概念，并讨论了它们的性质和相互关系，获得了一系列结果。
In this paper we give conpcept of pairwise (sime-) well compact sets in LF bitopological spaces and we discuss their property and relation.
讨论了半序集和半序拓扑空间中保序集值算子的最小与最大不动点的存在性。
The existence of the minimal and maximal fixed points for order preserving set-valued operators on semi-ordered sets and semi-ordered topological spaces was analyzed.
给出了不分明化拓扑空间中半开集和半连续函数的概念，并讨论了它们的某些性质。
We introduce the concepts of semi-open sets and semi-continuous functions, and discuss some of their properties in fuzzifying topology.
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