In this paper, strong pre-open and strong pre-close sets were introduced in topological spaces and their properties were researched.

在分明拓扑空间中引入强拟开集和强拟闭集的概念，并讨论了它们的性质。

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In this paper, strong pre-open and strong pre-close sets were introduced in topological spaces and their properties were researched.

在分明拓扑空间中引入强拟开集和强拟闭集的概念，并讨论了它们的性质。

youdao