[petsc-dev] Seeking Advice on Petsc Preconditioners to Try

[Jed Brown]

On Thu, Dec 29, 2011 at 11:15, Dave Nystrom <dnystrom1 at comcast.net> wrote:

> I have tried out -ksp_type cg -pc_type gamg -pc_gamg_type sa on my problem
> and am encouraged enough with the results that I would like to try taking
> the
> next step with using gamg.  Could you provide some advice on how to do
> that?
> I'm not sure how to provide the null space info you say is important.
>

Are you solving a scalar or vector problem?
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