摘要
用子集、并集及交集的定义以及等集定理给出所证无限集命题的证明。
The essay is referred to the use of the definitions of subset, unionset and intersection by wayofexplanation and then prove it by equipotent infinite set proposition.
关键词
子集
并集
交集
等集定理
无限集
union set
intersection
subset
equipotent set
