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| Cardinal numbers of some sets (Ⅱ) | |
| 引用本文： | 杨安洲, 卢朱祁, 陈培丽. Cardinal numbers of some sets (Ⅱ)[J]. 北京工业大学学报, 1982, 8(3): 132-132. |
| 作者姓名： | 杨安洲 卢朱祁 陈培丽 |
| 作者单位： | The Industrial University of Peking，The Industrial University of Peking，The Industrial University of Peking |
| 摘 要： | <正> In considering some basic concepts of mathematics, we obtained some elementary results: Theorem 1. Let X be an infinite set, E(X)={R∶R is an equivalence |
| 收稿时间： | 1982-05-10 |
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