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单词 ZermelosPostulate
释义

Zermelo’s postulate


If is a disjoint family of nonempty sets, then there is a set C which has exactly one element of each A (i.e such that AC is a singleton for each A.)

This is one of the many propositionsPlanetmathPlanetmathPlanetmath that are equivalentMathworldPlanetmathPlanetmathPlanetmathPlanetmath to the axiom of choiceMathworldPlanetmath.

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更新时间:2025/5/4 13:12:20