petsc-3.7.1 2016-05-15
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DMSNESGetJacobian

get SNES Jacobian evaluation function

Synopsis

#include "petscsnes.h" 
#include "petscdm.h" 
PetscErrorCode DMSNESGetJacobian(DM dm,PetscErrorCode (**J)(SNES,Vec,Mat,Mat,void*),void **ctx)
Not Collective Many br

Input Argument

dm -DM to be used with SNES Many br

Output Arguments

J - Jacobian evaluation function; see SNESJacobianFunction for all calling sequence Many br
ctx - context for residual evaluation Many br

Many br

Note

SNESGetJacobian() is normally used, but it calls this function internally because the user context is actually Many brassociated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or Many brnot. If DM took a more central role at some later date, this could become the primary method of setting the Jacobian. Many br

See Also

DMSNESSetContext(), SNESSetFunction(), DMSNESSetJacobian(), SNESJacobianFunction

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