petsc-3.14.6 2021-03-30

DMSNESCheckDiscretization

Check the discretization error of the exact solution

Synopsis

#include "petscdmplex.h" 
#include "petscsnes.h"   
PetscErrorCode DMSNESCheckDiscretization(SNES snes, DM dm, PetscReal t, Vec u, PetscReal tol, PetscReal error[])

Input Parameters

	snes	- the SNES object
	dm	- the DM
	t	- the time
	u	- a DM vector
	tol	- A tolerance for the check, or -1 to print the results instead

Output Parameters

error

- An array which holds the discretization error in each field, or NULL

Note: The user must call PetscDSSetExactSolution() beforehand

Level

developer

Location