Proposition 4
Tag 0B6D, permanent. Cite it as [Bourbaki, Tag 0B6D].
General Topology, chapter I, § 8. Hausdorff spaces and regular spaces
Every finite subset of a Hausdorff space is closed.
For every subset consisting of a single point is closed by reason of axiom (H\textsuperscript{i}).
Bourbaki puts the proof directly after the statement, so what is above is the statement and its proof together.
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