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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Boerdijk–Coxeter helix ： ウィキペディア英語版 Boerdijk–Coxeter helix The Boerdijk–Coxeter helix, named after H. S. M. Coxeter and A. H. Boerdijk, is a linear stacking of regular tetrahedra, arranged so that the edges of the complex that belong to a single tetrahedron form three intertwined helices. There are two chiral forms, with either clockwise or counterclockwise windings. Contrary to any other stacking of Platonic solids, the Boerdijk–Coxeter helix is not rotationally repetitive. Even in an infinite string of stacked tetrahedra, no two tetrahedra will have the same orientation. This is because the helical pitch per cell is not a rational fraction of the circle. Buckminster Fuller named it a ''tetrahelix'' and considered them with regular and irregular tetrahedral elements.〔http://www.rwgrayprojects.com/synergetics/s09/p3000.html〕 ==Architecture== See the Art Tower Mito. 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「Boerdijk–Coxeter helix」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.