petsc-3.9.4 2018-09-11
SNESGetJacobian
Returns the Jacobian matrix and optionally the user provided context for evaluating the Jacobian.
Synopsis
#include "petscsnes.h"
PetscErrorCode SNESGetJacobian(SNES snes,Mat *Amat,Mat *Pmat,PetscErrorCode (**J)(SNES,Vec,Mat,Mat,void*),void **ctx)
Not Collective, but Mat object will be parallel if SNES object is
Input Parameter
snes -the nonlinear solver context
Output Parameters
| Amat | - location to stash (approximate) Jacobian matrix (or NULL)
|
| Pmat | - location to stash matrix used to compute the preconditioner (or NULL)
|
| J | - location to put Jacobian function (or NULL), see SNESJacobianFunction for details on its calling sequence
|
| ctx | - location to stash Jacobian ctx (or NULL)
|
See Also
SNESSetJacobian(), SNESComputeJacobian(), SNESJacobianFunction, SNESGetFunction()
Level
advanced
Location
src/snes/interface/snes.c
Examples
src/ts/examples/tutorials/ex48.c.html
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages