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• 14:34, 5 July 2023 Admin talk contribs deleted page Σ-algebra (content was: "{{lowercase title}} {{Short description|Algebric structure of set algebra}} {{for|an algebraic structure admitting a given signature Σ of operations|Universal algebra}} In mathematical analysis and in probability theory, a '''σ-algebra''' (also '''σ-field''') on a set ''X'' is a nonempty collection Σ of subsets of ''X'' closed under complement, countable unions, and countable intersec...")
• 19:49, 15 June 2023 Manidh talk contribs imported Σ-algebra by file upload (1 revision)