(HYPRE_Solver solver,
HYPRE_PtrToSolverFcn precond,
HYPRE_PtrToSolverFcn precondT,
HYPRE_PtrToSolverFcn precond_setup,
HYPRE_Solver precond_solver)
(Optional) Set the preconditioner to use.
Documentation
(Optional) Set the preconditioner to use.
Note that the only preconditioner available in hypre for use with
CGNR is currently BoomerAMG. It requires to use Jacobi as
a smoother without CF smoothing, i.e. relax_type needs to be set to 0
or 7 and relax_order needs to be set to 0 by the user, since these
are not default values. It can be used with a relaxation weight for
Jacobi, which can significantly improve convergence.
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