- #1
foxjwill
- 354
- 0
Homework Statement
Is the gaussian curvature at a point on the surface [tex]g(x,y)=xy[/tex]
[tex]\frac{1}{(x^2+y^2+1)^2}?[/tex]
Homework Equations
shape operator:
[tex]S(\textbf{x})=-D_\textbf{x}\hat{\textbf{n}}=\frac{\partial (n_x, n_y)}{\partial (x,y)}[/tex]
Gaussian Curvature = [tex]|S(\textbf{x})|[/tex]
[tex]\hat{\textbf{n}}=\frac{\nabla g}{\|\nabla g\|}[/tex]
The Attempt at a Solution
I basically plugged stuff into the above equations. I'm not sure if they're all correct.