[petsc-users] Weighted Jacobi

[Dave May]

I believe what you are looking for is defined by the following options
  -ksp_type richardson
  -ksp_richardson_scale <value>
  -pc_type jacobi

Thanks,
  Dave

On 1 December 2015 at 08:57, Timothée Nicolas <timothee.nicolas at gmail.com>
wrote:

> Hi all,
>
> Is weighted Jacobi available as a preconditioner ? I can't find it in the
> list of preconditioners. If not, what is the rationale between this choice
> ? It is pretty straightforward to code, so if it is not available I can do
> it without problem I guess, but I am just wondering. In the matrix-free
> case where SOR is not available by default, it may be better than pure
> Jacobi, and much easier to parallelize than SOR.
>
> Best
>
> Timothee
>
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