[petsc-users] [DMMG] Stokes Solver

[Jed Brown]

On Fri, Apr 8, 2011 at 14:28, <domenico.borzacchiello at univ-st-etienne.fr>wrote:

> I Assumed that the FD evaluation of Jacobian would be exact since the the
> Function is linear.
>

Sort of, it's still a problem if your function looks like f(x) = huge +
epsilon * x. I suspect either a memory bug (try valgrind) or that your
FormFunctionLocal is using internal state or otherwise nonlinear.
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