On Mon, Apr 23, 2012 at 9:23 AM, Dominik Szczerba <dominik at itis.ethz.ch>wrote:
> Hi, > > I am implementing both FormFunction and FormJacobian for the SNES > solver. It seems to start off correctly, with the 2 functions being > called one after another in a loop, and with ||Ax-b|| decreasing about > 3 orders of magnitude. But then only the FormFunction is being called > several times, without subsequent calls to FormJacobian and obviously > the residue is not being reduced any further, because there are no > calls to the underlying ksp. If I inspect the solution it looks > This is a line search. If you upgrade to petsc-dev, line search has a lot more diagnostics. Matt > qualitatively "on the way" to the expected one, but the values are not > correct, just as if the iterations were prematurely stopped. What sort > of a problem can such a behavior indicate? > > Regards, > Dominik > -- 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120423/c6772a59/attachment-0001.htm>
