"Sun, Hui" <[email protected]> writes: > The multigrid method does not belong to the Krylov methods so it is > not there. I'm wondering which option should I specify if I want to > use multigrid and hence the NonlinearGS smoother?
-snes_type fas (or nonlinear preconditioning). I'm afraid you're going to have to read examples and documentation to learn how to operate the nonlinear solvers.
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