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Questions about abstract measure and Lebesgue integral theory. Also concerns such properties as measurability of maps and sets.

2 votes
2 answers
120 views

Is completion of measures equivalent to completion of sigma algebras as metric spaces with r...

An alternative way to get the Lebesgue $\sigma $-algebra $\mathcal{L} $ from the Borel algebra $B$ is to set $E\sim J$ iff $d(E,J):=\lambda(E\mathbin\Delta J)=0$ for $E,J\in B$. Then the completion of …
DJ Forklift's user avatar
6 votes
0 answers
122 views

Dependence on Urysohn's Lemma in Cartan's Construction of Haar Measure

This question was posted by someone else on stackexchange three months ago, but no one has answered as of yet: Cartan's 1940 paper, Sur la mesure de Haar, claims to provide a proof of the existence a …
DJ Forklift's user avatar