### Applet: Hyperbolic paraboloid coefficients

The hyperbolic paraboloid $z=Ax^2+By^2$ is plotted on a square domain \begin{gather*} -2 \le x \le 2\\ -2 \le y \le 2 \end{gather*} in the first panel and on the circular domain $x^2+y^2 \le 1.65^2$ in the second panel. You can drag the points to change the coefficients $A$ and $B$. $A$ is constrained to be positive, and $B$ is constrained to be negative.

Applet files: hyperbolic_paraboloid_coefficients.m, applet2/hyperbolic_paraboloid_coefficients.m

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