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), for calling sequence see SNESJacobianFunction

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

See Also#

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

Level#

advanced

Location#

src/snes/interface/snes.c

Examples#

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

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Index of all SNES routines
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Index of all manual pages