[petsc-users] preconditioning with Matrix-Free SNES

[behzad baghapour]

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
>
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