"Pratapa, Phanisri P" <[email protected]> writes: > What I mean is that: I want to implement multigrid preconditioning on > a new Krylov method that is not currently in PETSc.
Sure, implement it as a KSP. It's not difficult. > For this, I was hoping that I could replace the KSPFGMRES smoother > (default) I don't understand this statement. FGMRES is not the default, nor is it typically used as a smoother. Do you want to change the smoother (Chebyshev/SOR by default) or the Krylov accelerator?
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