(Optional) Defines which parallel interpolation operator is used
int HYPRE_BoomerAMGSetMinIter(HYPRE_Solver solver, int min_iter)
(Optional)
int HYPRE_BoomerAMGInitGridRelaxation(int **num_grid_sweeps_ptr, int **grid_relax_type_ptr, int ***grid_relax_points_ptr, int coarsen_type, double **relax_weights_ptr, int max_levels)
(Optional) This routine will be eliminated in the future