摘要
在拓扑学定理的证明过程中,教材一般都是利用逆否命题的证明方法来加以证明,本文则是采用直接的证明方法对定理进行严格的证明。
In the process of the theoretical proof about topology, we usually adopt the reverse ways to prove it. In this paper, we will introduce a new approach to demonstrate some theories.
关键词
拓扑空间
邻域
导集
凝聚点
topological space
neighborhood
derived set
agglomerate point
