Bourbaki

Remark 2

Tag 09NV, permanent. Cite it as [Bourbaki, Tag 09NV].

Integration, chapter IX, § 1. Premeasures and measures on a topological space

Beware, however, that the existence of a sequence of Borel sets of finite measure for μ\mu, with union T, does not necessarily imply the existence of a sequence of open sets of finite measure with union T (in other words, does not imply that μ\mu is moderated). See Exer. 8.

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.