PETSc version 3.17.0
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DMGetNullSpaceConstructor

Return the callback function which constructs the nullspace for a given field, or NULL

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMGetNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (**nullsp)(DM, PetscInt, PetscInt, MatNullSpace *))
Not collective

Input Parameters

dm - The DM
field - The field number for the nullspace

Output Parameter

nullsp - A callback to create the nullspace

Calling sequence of nullsp

    PetscErrorCode nullsp(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace)
dm - The present DM
origField - The field number given above, in the original DM
field - The field number in dm
nullSpace - The nullspace for the given field

This function is currently not available from Fortran.

See Also

DMSetNullSpaceConstructor(), DMSetNearNullSpaceConstructor(), DMGetNearNullSpaceConstructor(), DMCreateSubDM(), DMCreateSuperDM()

Level

intermediate

Location

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