PCGetFactoredMatrix
John R. Wicks
jwicks at cs.brown.edu
Thu Nov 29 12:07:24 CST 2007
I would like to compute the residual A - LU, where LU is the ILU
factorization of A. What is the most convenient way of doing so?
> -----Original Message-----
> From: owner-petsc-users at mcs.anl.gov
> [mailto:owner-petsc-users at mcs.anl.gov] On Behalf Of Matthew Knepley
> Sent: Thursday, November 29, 2007 12:04 PM
> To: petsc-users at mcs.anl.gov
> Subject: Re: PCGetFactoredMatrix
>
>
> It depends on the package, but the petsc stuff stores L and U
> in one matrix.
>
> Matt
>
> On Nov 29, 2007 9:03 AM, John R. Wicks <jwicks at cs.brown.edu> wrote:
> > The documentation for PCGetFactoredMatrix is not clear. What does
> > this return for ILU(0), for example? Does it return the
> product LU or
> > the in place factorization?
> >
> >
>
>
>
> --
> What most experimenters take for granted before they begin
> their experiments is infinitely more interesting than any
> results to which their experiments lead.
> -- Norbert Wiener
>
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