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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 Isogonal trajectory ： ウィキペディア英語版 Isogonal trajectory In differential geometry, a plane curve that crosses every member of a family of curves with the same crossing angle is called an isogonal trajectory of the family. If two families of curves all cross at the same angle, then each family is called a family of isogonal trajectories with respect to the other family.〔.〕 If the crossing angle is a right angle, the curves or families of curves are orthogonal trajectories. If one given family is described by the differential equation :$\backslash frac\; =\; f(x,y),$ then its isogonal family with crossing angle $\backslash alpha$ satisfies the differential equation :$\backslash frac\; =\; \backslash frac.$〔, Ex. 5, p. 120.〕 ==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「Isogonal trajectory」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.