摘要
本文讨论向量空间中有限个子空间的并集的三个等价命题以及和子空间与交子空间的有关性质。
This paper discusses three equivalent propositions about sum aggreg- ate in finite subspace of vector space,and then shows the properties of sum and intersection of subspace.
关键词
并集
子空间
和
交
向量空间
sum aggregate
sum subspace
intersection subspace
