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August 10, 2008, 15:45
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GMRES method .vs. bcg stab
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#1 |
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Guest
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Dear friends:
I want to know , GMRES and BI_CG_STAB, which is more better. regards |
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August 12, 2008, 07:28
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Re: GMRES method .vs. bcg stab
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#2 |
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Guest
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It depends on your equations, discretization, and preconditioner. You should try both (maybe (TF)QMR as well) with a selection of preconditioners. For most combinations from the following table, there is a matrix for which that combination is significantly better than the others. GMRES is pretty robust and makes a good default.
http://www-unix.mcs.anl.gov/petsc/pe...lvertable.html |
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