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Re: petsc-users

Actually, I believe that this is the wrong question. One of the
motivations behind
PETSc is the lack of any theory indicating which solver/pc performs best with
which equation/discretization. The only options is to try them all. We make this
easy. You can set -ksp_type and -pc_type from the command line. If the
combination
will not work, you jsut get an error and keep going. We usually use a
shell script for
this.

 Thanks,

   Matt

On 11/20/06, sqbang <sqbang@xxxxxxx> wrote: 
Dear sir:
    I would be most grateful if you could give me some suggestions on Petsc.
I'm a new user. One question I met is which method should be used when
solving FEM(finite element method)questions ? In detail,KSP gives several
methods and a lot of precondition, how to combinate them to work
effectively?  Does there exist the cases that some specific combinations are
forbidden?
     I would like to thank you for your generous help. Your prompt attention
to this letter would be highly appreciated.
     I am looking forward to hearing from you.
                                 sd.











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