second-countable

Adjective

not-comparable

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

Japanese Meaning

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。

Sense（1）

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