(Optional) Defines the smoother at a given cycle
(Optional) Defines the smoother at a given cycle. For options of relax_type see description of HYPRE_BoomerAMGSetRelaxType). Options for k are
the finest level if k=0 the down cycle if k=1 the up cycle if k=2 the coarsest level if k=3.
alphabetic index hierarchy of classes
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