[petsc-users] Automatic Differentiation

[Matthew Knepley]

On Tue, Jun 2, 2015 at 3:55 PM, Harshad Sahasrabudhe <hsahasra at purdue.edu>
wrote:

> Hi,
>
> Does PETSc have automatic differentiation capability? I'm solving an
> elliptic non-linear equation in which calculating the correct Jacobian is
> extremely demanding. The system doesn't converge with an approximate
> Jacobian. Is there any SNES solver I should try which doesn't use a
> Jacobian?
>

Do you mean it does not converge with the default FD Jacobian?

  Matt


> Thanks,
> Harshad
>



-- 
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
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