MathGloss

Let (X,Σ,μ)(X,\Sigma,\mu) be a measure space. A property PP holds almost everywhere in XX if there exists a set NΣN \in \Sigma such that μ(N)=0\mu(N) = 0 and PP is true for all xXNx \in X\setminus N.

Wikidata ID: Q1139334