1. Axiom of choiceIn mathematics, the axiom of choice, or AC, is an axiom of set theory equivalent to the statement that "the product of a collection of non-empty sets is non-empty". More explicitly, it is stating that for every indexed family of nonempty sets there exists an indexed family of elements such that for every . The axiom of choice was formulated in 1904 by Ernst Zermelo.
Read “Axiom of choice” on English Wikipedia
Read “選択公理” on Japanese Wikipedia
Read “Axiom of choice” on DBpedia
Read “Axiom of choice” on English Wikipedia
Read “選択公理” on Japanese Wikipedia
Read “Axiom of choice” on DBpedia
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