Bourbaki

Proposition 7

Tag 0BE2, permanent. Cite it as [Bourbaki, Tag 0BE2].

General Topology, chapter II, § 2. Uniformly continuous functions

Let f=(fi)f = (f_i) be a mapping of a uniform space YY into a product uniform space X=∏i∈IXiX = \prod_{i \in I} X_i. Then ff is uniformly continuous if and only if each fif_i is uniformly continuous.

Since fi=pri∘ff_i = pr_i \circ f, this is a particular case of Proposition 4 of no. 3.

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

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Transcribed from the printed volume. Not translated.