翻訳と辞書 Words near each other ・ hacker ethic ・ hacker humour ・ hacking run ・ hacking x for y ・ hackintosh ・ hackish ・ hackishness ・ hackitude ・ hair ・ hairy ・ hairy ball ・ hakmem ・ hakspek ・ hal ・ hal/s ・ half-duplex ・ halftone ・ halgol ・ halmat ・ halt and catch fire 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 hairy ball ： FOLDOC hairy ball A result in topology stating that a continuous {vector field} on a sphere is always zero somewhere. The name comes from the fact that you can't flatten all the hair on a hairy ball, like a tennis ball, there will always be a tuft somewhere (where the tangential projection of the hair is zero). An immediate corollary to this theorem is that for any {continuous map} f of the sphere into itself there is a point x such that f(x)=x or f(x) is the {antipode} of x. Another corollary is that at any moment somewhere on the Earth there is no wind. (2002-01-07) 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.