| 单词 | Urysohn lemma |
| 释义 | Urysohn lemma [`u̇r·ē´zōn ´lem·ǝ] MATHEMATICS If A and B are disjoint, closed sets in a normal space X, there is a real-valued function f such that 0 ≤ f (x ) ≤ 1 for all x∈X, and f (A ) = 0 and f (B ) = 1. |
| 随便看 |
|
科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。