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Tree ovals - mean, gmean & hmean
Tree ovals: mean - ellipse, gmean - Cassini oval & hmean - ???
Has the 3-d oval a name?
And what about Generalized mean?
Solution without animation is not solution!
For the hmean (d=-1) I think it is the Cayley oval!
https://mathcurve.com/courbes2d/cayleyovale/cayleyovale.shtml
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