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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 Nodary ： ウィキペディア英語版 Nodary In physics and geometry, the nodary is the curve that is traced by the focus of a hyperbola as it rolls without slipping along the axis, a roulette curve. 〔John Oprea, Differential Geometry and its Applications, MAA 2007. pp. 147–148〕 The differential equation of the curve is: $y^2\; +\; \backslash frac(u,k)+(a/k)\backslash big((1-k^2)u\; -\; E(u,k)\backslash big)$ :$y(u)=-a\backslash operatorname(u,k)+(a/k)\backslash operatorname(u,k)$ where $k=\; \backslash cos(\backslash tan^(b/a))$ is the elliptic modulus and $E(u,k)$ is the incomplete elliptic integral of the second kind and sn, cn and dn are Jacobi's elliptic functions.〔 The surface of revolution is the nodoid constant mean curvature surface. ==References== 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「Nodary」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.