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

[Thomas Witkowski]

Am 03.02.2012 14:11, schrieb Jed Brown:
> On Fri, Feb 3, 2012 at 16:03, Thomas Witkowski 
> <thomas.witkowski at tu-dresden.de 
> <mailto: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?
>
Just for the test I remove all scalings (so no timestep-sizes or other 
constants are multiplied). L and M are the standard matrices discretized 
with linear FEMs on a 2D box (no local mesh adaptivity).

Thomas
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