最終更新日：2025/11/22

(topology) Such that its topology has a countable base, said of a topological space.

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second-countable

元となった辞書の項目

second-countable

形容詞

比較不可

(topology) Such that its topology has a countable base, said of a topological space.

日本語の意味

第二可算性を有する：すなわち、その位相空間の位相が可算な基底（開集合系）を持つこと。

A second-countable manifold has many convenient properties, such as separability and metrizability under certain conditions.

可算基を持つ多様体は、可分性があり、特定の条件下では計量化可能であるなど多くの便利な性質を持つ。

意味（1）

(topology) Such that its topology has a countable base, said of a topological space.