On Thu, Jan 10, 2013 at 10:44 AM, w_ang_temp <w_ang_temp at 163.com> wrote:
> Hello, > > I want to determine the positive definiteness. So I want to know > > if it is a right way. > > I use "-ksp_type cg -pc_type none". You know, CG does not work for > > indefinite matrices. I get "Linear solve did not converge due to > > DIVERGED_INDEFINITE_MAT". From the information, I think it is indefinite. > > Is it a right way? > Its not full proof, but it could be a diagnostic. Matt > Thanks. > > Jim > > > -- 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130110/3db38021/attachment.html>
