PetscErrorCode SNESUpdateCheckJacobian(SNES snes,PetscInt it)

-snes_check_jacobian | - use this every time SNESSolve() is called | |

-snes_check_jacobian_view | - Display difference between Jacobian approximated by finite-differencing and the hand-coded Jacobian |

difference | - ||J - Jd||, the norm of the difference of the hand-coded Jacobian J and the approximate Jacobian Jd obtained by finite-differencing the residual, | |

ratio | - ||J - Jd||/||J||, the ratio of the norms of the above difference and the hand-coded Jacobian. |

** Level:intermediate
Location:**src/snes/impls/test/snestest.c

Index of all SNES routines

Table of Contents for all manual pages

Index of all manual pages