analyze preconditioned operator?

Jed Brown jed at
Thu Oct 9 14:02:45 CDT 2008

On Thu, Oct 9, 2008 at 20:22, Matt Funk <mafunk at> wrote:
> i am using PETSC and on top of it also SLEPC to do some matrix analysis.
> In Slepc i simply pass it the Petsc matrix to analyze it.
> However, is there anyway to analyze the preconditioned matrix at all?

You can certainly write a MatShell which applies B = P^-1 A and hand
this to SLEPc with no preconditioner.  This seems like a common thing
so maybe SLEPc has an option to use the preconditioned operator.


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