Bourbaki

Proposition 2

Tag 094R, permanent. Cite it as [Bourbaki, Tag 094R].

Integration, chapter V, § 6. Images of a measure

— For every numerical function f⩾0f \geqslant 0 defined on X,

∫∙f(x) dν(x)=∫∙f(π(t)) dμ(t). \int^\bullet f(x)\, d\nu(x) = \int^\bullet f(\pi(t))\, d\mu(t).
(2)

This follows from Th. 1 of §4, No. 2.

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

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Cites

Transcribed from the printed volume. Not translated.