[petsc-dev] ISRestoreNonlocalIS?

[Jed Brown]

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>