不分明化拓扑中的S──闭性

S──closeness in fuzzifying topology

在不分明化拓扑中定义了正则闭集，并用正则闭集和半开集刻画了拓扑学中一个重要内容─—S─—闭性．文中的术语和记号见文献[1～3]．

In this paper, we define the regular closed set and introduce the concept of s──closeness characterized in terms of regular closed sets. establish some of their properties in fuzzifying topology.