“first countable topological space”的概念、定义、翻译、参考文献-科学参考

单词	first countable topological space
释义	first countable topological space [¦fǝrst `kau̇nt·ǝ·bǝl ´täp·ǝ¦läj·ǝ·kǝl `spās] ^MATHEMATICS A topological space in which every point has a countable number of open neighborhoods so that any neighborhood of this point contains one of these.
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