[petsc-users] Gauss-Seidel

[tribur]

Hi Jed,

Thanks for the ultra fast response.

Apart from the nonzero initial guess, is -ksp_type preonly -pc_type sor 
-pc_sor_its 10 right?

Am 24.04.2012 03:29, schrieb Jed Brown:
> On Mon, Apr 23, 2012 at 20:27, tribur <burckhardt at itis.ethz.ch [1]>
> wrote:
>
>> I would like to do 10 iterations of a point-by-point Gauss-Seidel
>> procedure for the purpose of testing.
>>
>> Is it correct if I type "mpiexec -n 1 ... -ksp_type preonly
>> -pc_type sor -pc_sor_its 10"?
>>
>> How can I define the initial guess nonzero?
>
> With a nonzero initial guess, you are doing Richardson (not preonly).
> You can set the nonzero initial guess as usual
> (KSPSetInitialGuessNonzero()).
>
> Links:
> ------
> [1] mailto:burckhardt at itis.ethz.ch