On Tue, Jan 10, 2012 at 03:50, Alexander Grayver <agrayver at gfz-potsdam.de>wrote:
> > http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/KSP/KSPSetNullSpace.html > > You set nullspace without any particular information: > > ierr = MatNullSpaceCreate(PETSC_COMM_WORLD, PETSC_TRUE, 0, PETSC_NULL, > &nullsp); > ierr = KSPSetNullSpace(ksp, nullsp); > > What does it project and how works in this case? This removes the constant null space. The has_const argument is equivalent to creating a constant vector (but more efficient). -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120110/07ccf31e/attachment.htm>
