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, SNESJacobianFn **J, void **ctx)

Not Collective, but Mat object will be parallel if SNES 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), for calling sequence see SNESJacobianFn

• ctx - location to stash Jacobian ctx (or NULL)

See Also

SNES: Nonlinear Solvers, SNES, Mat, SNESSetJacobian(), SNESComputeJacobian(), SNESJacobianFn, SNESGetFunction()

Level

advanced

Location

src/snes/interface/snes.c

Examples

src/snes/tutorials/ex69.c
src/snes/tutorials/ex62.c

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Index of all SNES routines
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Index of all manual pages