DMSNESGetJacobian#

get SNES Jacobian evaluation function from a DMSNES object

Synopsis#

#include "petscsnes.h" 
#include "petscdm.h" 
PetscErrorCode DMSNESGetJacobian(DM dm, SNESJacobianFn **J, void **ctx)

Not Collective

Input Parameter#

  • dm - DM to be used with SNES

Output Parameters#

  • J - Jacobian evaluation function; for all calling sequence see SNESJacobianFn

  • ctx - context for residual evaluation

Note#

SNESGetJacobian() is normally used, but it calls this function internally because the user context is actually associated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or not.

Developer Note#

If DM took a more central role at some later date, this could become the primary method of setting the Jacobian.

See Also#

SNES: Nonlinear Solvers, DMSNES, DMSNESSetContext(), SNESSetFunction(), DMSNESSetJacobian(), SNESJacobianFn

Level#

developer

Location#

src/snes/utils/dmsnes.c


Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages