[petsc-users] Solving Poisson equation with multigrid

[Jed Brown]

Michele Rosso <mrosso at uci.edu> writes:

> Thank you.
> I will ask to update to 3.4 but I am working on a supercomputer thus I 
> do not have control on the installed software.

You can install in your $HOME.

> So you suggest to use conjugate gradient + multigrid as preconditioner, 
> correct?

Yes

> If so, I retain
>
> -ksp_type cg
>
> instead of
>
> -ksp_type richardson
>
> correct?

Yes