Sigma-algebra/Infobox

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< Sigma-algebra
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Sigma algebra
AA[ACA]
{An}n=1A[n=1AnA]
For a σ-algebra (X,AP(X))
(Unknown grade)
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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 X and