On Mon, Nov 21, 2011 at 04:00, Thomas Witkowski < Thomas.Witkowski at tu-dresden.de> wrote:
> Some technical question on this point: How can I explicitly factorize a > sequential matrix? Is MatLUFactor the correct function to do it? In general, I recommend using the KSP. You can KSPSetType(ksp,KSPPREONLY), PCSetType(pc,PCLU). Call KSPSolve() multiple times, the factorization will be reused. Or you can use MatLUFactor() directly if you really want. > If so, how can I provide the package (i.e. umfpack) that should be used > for factorization? See the MatSolverPackage argument in one of these. http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/PC/PCFactorSetMatSolverPackage.html http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MatGetFactor.html -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111121/a196e453/attachment-0001.htm>
