PETSc version 3.15.5
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/snes/tutorials/ex62.c.html
src/ts/tutorials/ex48.c.html
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages