petsc-3.4.5 2014-06-29

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 (**SNESJacobianFunction)(SNES,Vec,Mat*,Mat*,MatStructure*,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)
SNESJacobianFunction - location to put Jacobian function (or NULL)
ctx - location to stash Jacobian ctx (or NULL)

See Also

SNESSetJacobian(), SNESComputeJacobian()

Level:advanced
Location:src/snes/interface/snes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages