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关注:1
2013-05-23 12:21
求翻译:a collection B of open sets in R is a basis for open sets if every open set in R is a union of some of the R's是什么意思? 待解决
悬赏分:1
- 离问题结束还有
a collection B of open sets in R is a basis for open sets if every open set in R is a union of some of the R's
问题补充: |
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