On Fri, Apr 12, 2013 at 9:44 AM, Hui Zhang <mike.hui.zhang at hotmail.com>wrote:
> Assembly of local Mat's to a parallel Mat formally defined by A = \sum_i > Ri^T Ai Ri. > > My Ai's are originally defined in sub-communicators. In Petsc, I was told > before there are no counterpart of Ri that can promote the mat Ai to > sup-communicator where A stays. (VecScatter can only acts on Vec but not > Mat) > > So, what is the easiest way to achieve this task? Note that Ai's are > already defined in sub-communicators. > What are you trying to do? Get the action of A, or assemble it directly? Matt -- 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/20130412/d202e878/attachment.html>
