petsc-3.14.6 2021-03-30
DMSNESCheckJacobian
Check the Jacobian of the exact solution against the residual using the Taylor Test
Synopsis
#include "petscdmplex.h"
#include "petscsnes.h"
PetscErrorCode DMSNESCheckJacobian(SNES snes, DM dm, Vec u, PetscReal tol, PetscBool *isLinear, PetscReal *convRate)
Input Parameters
| snes | - the SNES object
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| dm | - the DM
|
| u | - a DM vector
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| tol | - A tolerance for the check, or -1 to print the results instead
|
Output Parameters
| isLinear | - Flag indicaing that the function looks linear, or NULL
|
| convRate | - The rate of convergence of the linear model, or NULL
|
See Also
DNSNESCheckFromOptions(), DMSNESCheckDiscretization(), DMSNESCheckResidual()
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