[petsc-users] snes + matrix free + coloring

[panourg at mech.upatras.gr]

Dear all

I have a non-linear system which i want to solve it with matrix free
method. However i must form the whole proconditioning matrix using finite
differences and coloring method.

I can set the function F() of non-linear system (i take the notation F()
from documentation).

Could you send me exactly the commands and the order of it which i must
use or an apt example for that?

I have looked for that in internet but i could not find any suitable example.

Kostas

Thanks