Laplace-Beltrami operator

Laplace-Beltrami operator for parametrized and implicit manifolds.

The program creates a function for evaluating the Laplace-Beltrami operator of a given function on a manifold, which can have arbitray dimension and co-dimension, and can be given in parametrized or implicit form. The icon, showing a torus colored by the Laplace-Beltrami of some function, can be generated by a few lines of code. The program is based on automatic differentiation, and not on finite differences or the symbolic toolbox.