[petsc-users] diagonal preconditioner?

[Barry Smith]

    PCJACOBI supports the following options: -pc_jacobi_rowmax /  
PCJacobiSetUseRowMax() or -pc_jacobi_rowsum / PCJacobiSetUseRowSum() or
-pc_jacobi_abs / PCJacobiSetUseAbs() or the default of just using the  
diagonal entry.

    If you want to use some other diagonal matrix to build the  
preconditioner then pass the diagonal matrix as the second matrix to  
KSPSetOperators() or SNESSetJacobian() and use Jacobi preconditioning  
with that matrix.

    Barry

On Dec 30, 2009, at 3:58 PM, Dominik Szczerba wrote:

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> Does Petsc implement a diagonal preconditioner? The simplest I can see
> is Jacobi...
>
> Dominik
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