[petsc-users] SNESSetJacobian and TSSetRHSJacobian

[Peter Brune]

This may be done with the command-line option:

-snes_fd

- Peter


On Wed, May 22, 2013 at 4:03 PM, Zou (Non-US), Ling <ling.zou at inl.gov>wrote:

> Hi All,
>
> In 'SNESSetJacobian' I could pass 'SNESDefaultComputeJacobian' to let
> PETSc do the finite differencing for me to calculate Jacobian, i.e.,
>
> SNESSetJacobian(snes, J, J, SNESDefaultComputeJacobian, PETSC_NULL);
>
>
> In TSSetRHSJacobian, this options seems to be invalid, i.e., it requires a
> function to evaluate the Jacobian, i.e.,
>
>
> TSSetRHSJacobian(ts, J, J, FormRHSJacobian, PETSC_NULL);
>
>
> Is it possible that TS could also use PETSc finite differencing Jacobian
> as SNES does?
>
>
> Best,
>
>
> Ling
>
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