MG question

jens.madsen at jens.madsen at
Wed Feb 27 13:31:43 CST 2008



I hope that this question is not outside the scope of this mailinglist.


As far as I understand PETSc uses preconditioned GMRES(or another KSP
method) as pre- and postsmoother on all multigrid levels? I was just
wondering why and where in the literature I can read about that method?
I thought that a fast method would be to use MG (with Gauss-Seidel
RB/zebra smothers) as a preconditioner for GMRES? I have looked at
papers written by Oosterlee etc.


Kind Regards 

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