[petsc-users] ML and linear elasticity

[Jed Brown]

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?
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