On Fri, Dec 3, 2010 at 20:53, Vijay S. Mahadevan <vijay.m at gmail.com> wrote:
> So this does require the fine grid matrix to be formed explicitly and > handed over to the top level KSP solver ? > If you want to use Galerkin coarse operators, then you have to assemble the fine-grid matrix. This is an algorithmic issue, not a matter of PETSc's API or something like that. If you can provide matrix-free residuals/smoothers, then you don't need to use the Galerkin procedure to build coarse operators. Jed -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20101203/1b3e1288/attachment.htm>
