rectangular orthogonal mesh in O (M log M) steps, where M is the total number of grid points.
The scheme relies on an upwind finite difference approximation to the gradient and a
resulting causality relationship that lends itself to a Dijkstra-like programming approach. In
this paper, we discuss several extensions to this technique, including higher order versions
on unstructured meshes in Rn and on manifolds and connections to more general static …