#include "petscfe.h" PetscErrorCode PetscDualSpaceGetPointSubspace(PetscDualSpace sp, PetscInt point, PetscDualSpace *bdsp)If the dual space is not defined on the mesh point (e.g. if the space is discontinuous and pointwise values are not defined on the element boundaries), or if the implementation of PetscDualSpace does not support extracting subspaces, then NULL is returned.
This does not increment the reference count on the returned dual space, and the user should not destroy it.
|sp||- the PetscDualSpace object|
|point||- the point (in the dual space's DM) for which the subspace is desired|