antisymmetric jacobian for SNES?

Matthew Knepley knepley at
Tue Sep 16 13:27:19 CDT 2008

On Tue, Sep 16, 2008 at 12:58 PM, Sean Dettrick <sdettrick at> wrote:
> Hello,
> I am looking at finite differencing a non-linear problem which has the
> square of a gradient in it.  It appears to lead to an antisymmetric Jacobian
> matrix.  Can anyone comment on whether SNES can handle an antisymmetric
> Jacobian?  If not, then could I just use snes_fd ?

There are no inherent symmetry limitations.


> Thanks,
> Sean
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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