Remark

Tag 0C5Q, permanent. Cite it as [Bourbaki, Tag 0C5Q].

General Topology, chapter IX, § 4. Normal spaces

Note that we have used only the fact that the covering $(A_i)$ is point-finite, i.e., that every point of $X$ belongs to only a finite number of sets $A_i$ .

Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.

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Cites

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