petsc-users

[sqbang]

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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