petsc-3.13.6 2020-09-29
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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

Examples

src/tao/tutorials/ex3.c.html

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