| 单词 | axiom of countability |
| 释义 | axiom of countability in American Englishnoun Math the property satisfied by a topological space in which the neighborhood system of each point has a base consisting of a countable number of neighborhoods (first axiom of countability) or the property satisfied by a topological space that has a base for its topology consisting of a countable number of subsets of the space (second axiom of countability) |
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