翻訳と辞書 Words near each other ・ Whitehawk Hill transmitting station ・ Whitehawk, California ・ Whitehead ・ Whitehead (bird) ・ Whitehead (surname) ・ Whitehead baronets ・ Whitehead Bros. ・ Whitehead conjecture ・ Whitehead Dock, New Jersey ・ Whitehead Eagles F.C. ・ Whitehead group ・ Whitehead Hicks ・ Whitehead Institute ・ Whitehead Island ・ Whitehead Light ・ Whitehead link ・ Whitehead manifold ・ Whitehead Mann ・ Whitehead Mark 1 torpedo ・ Whitehead Mark 1B torpedo ・ Whitehead Mark 2 torpedo ・ Whitehead Mark 2C torpedo ・ Whitehead Mark 3 torpedo ・ Whitehead Mark 5 torpedo ・ Whitehead Memorial Museum ・ Whitehead No. 21 ・ Whitehead Prize ・ Whitehead problem ・ Whitehead product ・ Whitehead railway station 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 Whitehead link ： ウィキペディア英語版 Whitehead link In knot theory, the Whitehead link, named for J. H. C. Whitehead, is one of the most basic links. Whitehead spent much of the 1930s looking for a proof of the Poincaré conjecture. In 1934, the Whitehead link was used as part of his construction of the now-named Whitehead manifold, which refuted his previous purported proof of the conjecture. ==Structure== The link is created with two projections of the unknot: one circular loop and one figure eight-shaped loop (i.e., a loop with a Reidemeister Type I move applied) intertwined such that they are inseparable and neither loses its form. Excluding the instance where the figure eight thread intersects itself, the Whitehead link has four crossings. Because each underhand crossing has a paired upperhand crossing, its linking number is 0. It is not isotopic to the unlink, but it is link homotopic to the unlink. In braid theory notation, the link is written :$\backslash sigma^2\_1\backslash sigma^2\_2\backslash sigma^\_1\backslash sigma^\_2.\backslash ,$ Its Jones polynomial is :$V(t)=t^\{-\; \{3\; \backslash over\; 2\}\}(-1+t-2t^2+t^3-2t^4+t^5).$ This polynomial and $V(1/t)$ are the two factors of the Jones polynomial of the L10a140 link. Notably, $V(1/t)$ is the Jones polynomial for the mirror image of a link having Jones polynomial $V(t)$. 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「Whitehead link」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.