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二次曲面の接平面

Author:Bunryu Kamimura

接平面の式はax_1x+by_1y+cz_1z=1となる。A（x_1,y_1.z_1)

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接点の作る円は内接円
サイクロイド
等積変形2
対数螺旋
二次曲線と離心率

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