On Mon, Apr 2, 2012 at 07:44, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> The block size is used if you don't provide any other information. The > preferred approach with petsc-dev is to use MatSetNearNullSpace(). (I'll > make sure this is currently working with ML and reply to this message.) I pushed ML support for user-provided null spaces to petsc-dev. Call MatSetNearNullSpace() to provide the information. You can use MatNullSpaceCreateRigidBody() if you have nodal coordinates. Mark, what is the best way to make PCGAMG use this interface? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120402/b6214df8/attachment.htm>
