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圆锥曲线反演

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hbghlyj posted 2023-5-12 18:32 |Read mode
Geogebra / Polar Command
geometry.asy中的tangents函数可以画切线

改造为polar函数,画圆锥曲线外的点的极线

用polar和diameter相交得反演点

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original poster hbghlyj posted 2023-5-12 19:00
圆的反演像
Inversions in an Ellipse
Arxiv José L. Ramírez

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青青子衿 posted 2023-5-15 15:59
hbghlyj 发表于 2023-5-12 19:00
圆的反演像
Inversions in an Ellipse
Arxiv José L. Ramírez
好神奇的"Pappus chain of ellipses",鞋匠刀的推广版

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original poster hbghlyj posted 2023-5-15 17:18
青青子衿 发表于 2023-5-15 08:59
好神奇的"Pappus chain of ellipses",鞋匠刀的推广版
Pappus chain的仿射

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