petsc-3.11.4 2019-09-28
DMPlexSNESComputeJacobianFEM
Form the local portion of the Jacobian matrix J at the local solution X using pointwise functions specified by the user.
Synopsis
#include "petscdmplex.h"
#include "petscsnes.h"
PetscErrorCode DMPlexSNESComputeJacobianFEM(DM dm, Vec X, Mat Jac, Mat JacP,void *user)
Input Parameters
| dm | - The mesh
|
| X | - Local input vector
|
| user | - The user context
|
Output Parameter
Jac -Jacobian matrix
Note
We form the residual one batch of elements at a time. This allows us to offload work onto an accelerator,
like a GPU, or vectorize on a multicore machine.
See Also
FormFunctionLocal()
Level
developer
Location
src/snes/utils/dmplexsnes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages