On Tue, Jan 17, 2012 at 02:31, <domenico.borzacchiello at univ-st-etienne.fr>wrote:
> I'd like to know if the tufo-fischer direct solver is suitable to solve > saddle problems. > Not unless you formulate A^T A which doubles the condition number. If you need a direct coarse level solver, I suggest using MUMPS or SuperLU_DIST, semi-redundantly if you have too many processors (e.g. thousands). -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120117/2bcf7280/attachment.htm>
