Gaussian curvature of a graph surface
= Gaussian curvature of a graph surface
{c}
For the graph of $h$,
$$
K=\frac{h_{xx}h_{yy}-h_{xy}^2}{(1+h_x^2+h_y^2)^2}.
$$
= Gaussian curvature of a graph surface
{c}
For the graph of $h$,
$$
K=\frac{h_{xx}h_{yy}-h_{xy}^2}{(1+h_x^2+h_y^2)^2}.
$$