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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 27 lines on a cubic surface ： ウィキペディア英語版 Cubic surface A cubic surface is a projective variety studied in algebraic geometry. It is an algebraic surface in three-dimensional projective space defined by a single quaternary cubic polynomial which is homogeneous of degree 3 (hence, cubic). Cubic surfaces are del Pezzo surfaces. ==Examples== If $\backslash mathbb^3$ has homogeneous co-ordinates $()$, then the set of points where :$X^3\; +\; Y^3\; +\; Z^3\; +\; W^3\; =\; 0$ is a cubic surface called the Fermat cubic surface. The Clebsch surface is the set of points where :$X^3\; +\; Y^3\; +\; Z^3\; +\; W^3\; =\; (X+Y+Z+W)^3$ Cayley's nodal cubic surface is the set of points where :$WXY\; +\; XYZ\; +\; YZW\; +\; ZWX\; =0$ 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「Cubic surface」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.