[petsc-users] example on manually setup matrix coloring for finite difference Jacobian?

[Zou (Non-US), Ling]

Hi All,

If I have a 2-d problem with unstructured triangle mesh, I suppose I
need handle the coloring manually in case I need the finite
differencing Jacobian. Also I guess it is doable as I know the mesh
connectivity. I noticed there are several examples handling structured
mesh case. Is there any example to setup the matrix coloring for this
kind of case?

Best,

Ling