MatSNESMFAddNullSpace

 Provides a null space that an operator is supposed to have. Since roundoff will create a small component in the null space, if you know the null space you may have it automatically removed.

Synopsis

#include "petscsnes.h"   
PetscErrorCode PETSCSNES_DLLEXPORT MatSNESMFAddNullSpace(Mat J,MatNullSpace nullsp)
Collective on Mat

Input Parameters

J - the matrix-free matrix context
nullsp - object created with MatNullSpaceCreate()

Keywords

SNES, matrix-free, null space

See Also

MatNullSpaceCreate(), MatSNESMFGetH(), MatCreateSNESMF(),
MatSNESMFSetHHistory(), MatSNESMFResetHHistory(), MatSNESMFKSPMonitor(), MatSNESMFErrorRel()

Level:advanced
Location:src/snes/mf/snesmfj.c
Index of all SNESMF routines
Table of Contents for all manual pages
Index of all manual pages