On Thu, Nov 18, 2010 at 23:35, Barry Smith <bsmith at mcs.anl.gov> wrote:
> MatGetRedundantMatrix() which is used by PCREDUNDANT which is very useful > doing multigrid when you want to solve the coarse problems on subsets of > processes :-) That matrix lives on subcomms (which is completely sane), not on the global comm. The thing I was calling strange would be to concatenate all the redundant matrices and make the concatenated thing live on the global comm. Jed -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20101119/6558e428/attachment.html>
