[petsc-users] snes + matrix free + coloring

panourg at mech.upatras.gr panourg at mech.upatras.gr
Wed Oct 10 15:32:04 CDT 2012

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.



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