petsc-3.4.2 2013-07-02
MatMFFDAddNullSpace
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 "petscmat.h"
PetscErrorCode MatMFFDAddNullSpace(Mat J,MatNullSpace nullsp)
Logically Collective on Mat
Input Parameters
Keywords
SNES, matrix-free, null space
See Also
MatNullSpaceCreate(), MatMFFDGetH(), MatCreateSNESMF(), MatCreateMFFD(), MATMFFD
MatMFFDSetHHistory(), MatMFFDResetHHistory()
Level:advanced
Location:src/mat/impls/mffd/mffd.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages