[petsc-users] Advice Being Sought

[Jed Brown]

Tahar Amari <tahar.amari at polytechnique.edu> writes:

> I am not sure I understand your point.  I guess you mean that inside
> petsc only a version of Gmres working with preconditioning is not yet
> implemanted , Am I right ?

I have no idea what Matt intended to say, but all PETSc Krylov methods
use preconditioners.  However, as Matt and Mark said, multigrid is much
better than block Jacobi as a preconditioner for these problems.