🌐日本語EnglishEspañolNederlandsفارسی中文日本語EntityQ2513496· pop 7· linked from 35 articles選択関数mathematical function f that is defined on some collection X of nonempty sets and assigns some element of each set S in that collection to S by f(S)Available in 7 languagesEspañol中文GreekNederlandsUkrainianفارسیvia Wikidata sitelinks · CC0ConnectionsInternational Standard Book NumberEntityfunctionEntityCategoriesAxiom of choiceBasic concepts in set theory