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

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Index of all SNES routines
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Index of all manual pages