Collapsing algebra: Difference between revisions

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In mathematics, a '''collapsing algebra''' is a type of [[Boolean algebra (structure)|Boolean algebra]] sometimes used in [[Forcing (mathematics)|forcing]] to reduce ("collapse") the size of [[Cardinal number|cardinals]]. The [[poset]]s used to generate collapsing algebras were introduced by [[Azriel Lévy]] in 1963.{{sfn|Lévy|1963|p=593}}