PETSc version 3.15.5
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 | 
|  | dm | - the DM | 
|  | u | - a DM vector | 
|  | 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