翻訳と辞書 Words near each other ・ Empty Nest (film) ・ Empty nest syndrome ・ Empty net goal ・ Empty nose syndrome ・ Empty Places (Buffy the Vampire Slayer) ・ Empty Pools ・ Empty product ・ Empty Room ・ Empty Room (Sanna Nielsen song) ・ Empty Room / Nutshell ・ Empty Rooms ・ Empty Saddles ・ Empty Saddles (song) ・ Empty sella syndrome ・ Empty semigroup ・ Empty set ・ Empty Sky ・ Empty Sky (memorial) ・ Empty Socks ・ Empty Souls ・ Empty space ・ Empty Space (Buckethead album) ・ Empty Space (Lycia album) ・ Empty Spaces ・ Empty Stares ・ Empty Streets ・ Empty string ・ Empty sum ・ Empty the Bones of You ・ Empty tomb Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Empty set ： ウィキペディア英語版 Empty set In mathematics, and more specifically set theory, the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set; in other theories, its existence can be deduced. Many possible properties of sets are trivially true for the empty set. ''Null set'' was once a common synonym for "empty set", but is now a technical term in measure theory. The empty set may also be called the ''void set''. ==Notation== Common notations for the empty set include "{}", "∅", and "$\backslash emptyset$". The latter two symbols were introduced by the Bourbaki group (specifically André Weil) in 1939, inspired by the letter Ø in the Norwegian and Danish alphabets (and not related in any way to the Greek letter Φ).〔(Earliest Uses of Symbols of Set Theory and Logic. )〕 The empty-set symbol (unicode:∅) is found at Unicode point U+2205.〔(Unicode Standard 5.2 )〕 In TeX, it is coded as \emptyset or \varnothing. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Empty set」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.