On Tue, 19 Jan 2016, Salazar De Troya, Miguel wrote:
Related to this issue, I would like to pass the rigid body modes to
a multigrid preconditioner. I’ve seen that there is an interface in
libMesh through PetscNonlinearSolver::nearnullspace, but my system
is a FEMSystem with a NewtonSolver. It looks like it is not related
to the PetscNonlinearSolver. Is there anyway to do this with
FEMSystem?
With NewtonSolver, not easily. You might be able to interface to that
API via PetscDiffSolver; if you do we'd love a patch.
---
Roy
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