[petsc-users] Use boomeramg to solve system of PDEs

[Jed Brown]

On Fri, Feb 3, 2012 at 16:03, Thomas Witkowski <
thomas.witkowski at tu-dresden.de> wrote:

> The system writes
>
> L 0 M
> M L 0
> L M L
>
> With L = discrete laplace, M = mass matrix, 0 = empty matrix
>

Hmm, what are the relative scales of these equations?


>
>
>> AMG is more delicate and generally less robust for systems.
>>
> Is this different with geometric multigrid?
>

Null space issues are usually easier with geometric, but constructing low
energy interpolants can require custom work.
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