Hyperbolic Paraboloids

This is the equation of a hyperbolic paraboloid whose axis is the z-axis.

As with the elliptic paraboloids, this is an explicit equation, of the form "z=..."

> hyperpara:=x^2/a^2-y^2/b^2;

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

> hyperpara1:=subs({a=1,b=2},hyperpara);

>

Plot of hyperbolic paraboloid "hyperpara1"