Ellipsoids

Here is the general equation for an ellipsoid

> ellip:=x^2/a^2+y^2/b^2+z^2/c^2=1;

Let's check it out for a=1, b=2, and c=3

> ellip1:=subs({a=1,b=2,c=3},ellip);

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Plot of the Ellipsoid

Half-plot of the Ellipsoid (to see cross-section)