Hi, Petsc team, I am doing something using multigrid as a preconditioner for GMRES. From the official case,
most use KSP (Chebyshev) and PC (SOR) for solving the preconditioning system for every level of multigrid except the coarse one. -ksp_type gmres -pc_type mg -pc_mg_levels 3 -mg_levels_ksp_type Chebyshev -mg_levels_pc_type SOR I would like to use SOR for solving the preconditioning system directly. I can not find that Petsc supports non-KSP iterative solver for a linear system, right? If I am wrong, please let me know. Xiaodong Liu, PhD X: Computational Physics Division Los Alamos National Laboratory P.O. Box 1663, Los Alamos, NM 87544 505-709-0534
