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Tangent developable : ウィキペディア英語版 | Tangent developable
The tangent developable of a space curve is a developable surface formed by the union of the tangent lines to the curve. ==Parameterization== Let be a parameterization of a smooth space curve. That is, is a twice-differentiable function with nowhere-vanishing derivative that maps its argument (a real number) to a point in space; the curve is the image of . Then a two-dimensional surface, the tangent developable of , may be parameterized by the map :〔.〕 The original curve forms a boundary of the tangent developable, and is called its directrix.
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「Tangent developable」の詳細全文を読む
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