Thank you. Now, I received the error which I should change Mat into mffd. On Tue, Jun 12, 2012 at 8:22 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> On Tue, Jun 12, 2012 at 10:50 AM, behzad baghapour < > behzad.baghapour at gmail.com> wrote: > >> Since the option "-snes_mf" does not call FormJacobian, then how I should >> set the required preconditioning matrix in the procedure of matrix-free >> SNES? > > > Use -snes_mf_operator instead of -snes_mf > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120612/989cb64e/attachment.html>
