DMSetNullSpaceConstructor

Provide a callback function which constructs the nullspace for a given field, defined with DMAddField(), when function spaces are joined or split, such as in DMCreateSubDM()

Synopsis

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMSetNullSpaceConstructor(DM dm, PetscInt field, PetscErrorCode (*nullsp)(DM dm, PetscInt origField, PetscInt field, MatNullSpace *nullSpace))

Logically Collective; No Fortran Support

Input Parameters

• dm - The DM

• field - The field number for the nullspace

• nullsp - A callback to create the nullspace

Calling sequence of nullsp

• 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

See Also

DM Basics, DM, DMAddField(), DMGetNullSpaceConstructor(), DMSetNearNullSpaceConstructor(), DMGetNearNullSpaceConstructor(), DMCreateSubDM(), DMCreateSuperDM()

Level

intermediate

Location

src/dm/interface/dm.c

Examples

src/snes/tutorials/ex69.c
src/snes/tutorials/ex62.c
src/ts/tutorials/ex30.c
src/ts/tutorials/ex76.c
src/ts/tutorials/ex77.c
src/snes/tutorials/ex76.c

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Index of all DM routines
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Index of all manual pages