Borel sigma-algebra
= Borel sigma-algebra
{title2=$\mathcal B(X)$}
The Borel sigma-algebra of a <topological space> $X$ is the <sigma-algebra> generated by its <open set>[open sets]. Its members are exactly the <Borel set>[Borel sets].
= Borel sigma-algebra
{title2=$\mathcal B(X)$}
The Borel sigma-algebra of a <topological space> $X$ is the <sigma-algebra> generated by its <open set>[open sets]. Its members are exactly the <Borel set>[Borel sets].