View source for Sigma-algebra/Infobox

{{Infobox
|title=Sigma algebra
|above=<div style="font-size:1.2em;text-align:left;">{{MM|1=\forall A\in\mathcal{A}[A^C\in\mathcal{A}]}}<br/>{{MM|1=\forall\{A_n\}_{n=1}^\infty\subseteq\mathcal{A}\left[\bigcup_{n=1}^\infty A_n\in\mathcal{A}\right]}}</div>For a {{sigma|algebra}} {{M|(X,\mathcal{A}\subseteq\mathcal{P}(X))}}
}}<noinclude>
{{Stub page|Requires fleshing out, sigma-algebras have products and subspace constructions too! Add [[trace sigma-algebra]], [[pre-image sigma-algebra]], some of the properties like being closed under set-subtraction, containing both {{M|X}} and {{M|\emptyset}}}}
[[Category:Infoboxes]]
</noinclude>