Thanks Jed for the point. Best, Mohamad
On Sun, Jan 8, 2012 at 6:54 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote: > On Sun, Jan 8, 2012 at 20:28, Mohamad M. Nasr-Azadani <mmnasr at > gmail.com>wrote: > >> Maybe I was not 100% clear, the way that I dealt with the nullspace was >> to set the pressure to zero at one node in the entire domain. > > > Well, this pollutes the spectrum, although most preconditioners fix it. We > recommend using KSPSetNullSpace() instead. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120108/2fdd8468/attachment.htm>
