petsc-3.9.2 2018-05-20
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DMGetDefaultConstraints

Get the PetscSection and Mat the specify the local constraint interpolation. See DMSetDefaultConstraints() for a description of the purpose of constraint interpolation.

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetDefaultConstraints(DM dm, PetscSection *section, Mat *mat)
not collective

Input Parameter

dm -The DM

Output Parameter

section - The PetscSection describing the range of the constraint matrix: relates rows of the constraint matrix to dofs of the default section. Returns NULL if there are no local constraints.
mat - The Mat that interpolates local constraints: its width should be the layout size of the default section. Returns NULL if there are no local constraints.

Note: This gets borrowed references, so the user should not destroy the PetscSection or the Mat.

See Also

DMSetDefaultConstraints()

Level

advanced

Location

src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages