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[几何] 蒙日圆的推广

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hbghlyj Posted 2020-5-27 17:27 |Read mode

与曲面$ax^2+by^2+cz^2=1(abc\ne0)$相切的三个互相垂直的平面的交点在球面$x^2+y^2+z^2=\frac1a+\frac1b+\frac1c$上

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色k Posted 2020-5-28 01:26

见 forum.php?mod=redirect&goto=findpost& … d=5755&pid=28963

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