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#

SNES: Nonlinear Solvers, DNSNESCheckFromOptions(), DMSNESCheckDiscretization(), DMSNESCheckResidual()

Level#

developer

Location#

src/snes/utils/dmplexsnes.c

Index of all SNES routines
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