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bn:03552436n
Noun Concept
PT
sigma-anel  σ-anel
EN
In mathematics, a nonempty collection of sets is called a 𝜎-ring if it is closed under countable union and relative complementation. Wikipedia
Relations
Sources
IS A
família de conjuntos
HAS KIND
sigma-álgebra
Wikidata
PT
sigma-anel
Wikidata Alias
PT
σ-anel

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