翻訳と辞書 Words near each other ・ interupt ・ interviews ・ interworking ・ intranet ・ intrinsics ・ intrusion countermeasure electronics ・ intrusive testing ・ intuition ・ intuitionism ・ intuitionist logic ・ intuitionistic logic ・ intuitionistic probability ・ invariant ・ inverse ・ inverse address resolution protocol ・ inverse comment convention ・ inverted index ・ inworld vr ・ io ・ ioi 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 intuitionistic logic ： FOLDOC intuitionistic logic Brouwer's foundational theory of mathematics which says that you should not count a proof of (There exists x such that P(x)) valid unless the proof actually gives a method of constructing such an x. Similarly, a proof of (A or B) is valid only if it actually exhibits either a proof of A or a proof of B. In intuitionism, you cannot in general assert the statement (A or not-A) (the principle of the {excluded middle}); (A or not-A) is not proven unless you have a proof of A or a proof of not-A. If A happens to be {undecidable} in your system (some things certainly will be), then there will be no proof of (A or not-A). This is pretty annoying; some kinds of perfectly healthy-looking examples of {proof by contradiction} just stop working. Of course, excluded middle is a theorem of classical logic (i.e. non-intuitionistic logic). {History (http://britanica.com/bcom/eb/article/3/0,5716,118173+14+109826,00.html)}. (2001-03-18) 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.