On Mon, Apr 23, 2012 at 08:41, Matthew Knepley <knepley at gmail.com> wrote:
> -snes_mf uses FD to approximate the ACTION of the operator. The above > quotes are talking about using FD to approximate the operator itself. > I.e., to assemble as a sparse matrix, so that it can be used as input to a preconditioning method. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120423/237debdf/attachment.htm>
