petsc-3.3-p7 2013-05-11

SNESGetTolerances

Gets various parameters used in convergence tests.

Synopsis

#include "petscsnes.h"  
#include "petscdmshell.h" 
#include "petscsys.h" 
PetscErrorCode  SNESGetTolerances(SNES snes,PetscReal *atol,PetscReal *rtol,PetscReal *stol,PetscInt *maxit,PetscInt *maxf)

Not Collective

Input Parameters

	snes	- the SNES context
	atol	- absolute convergence tolerance
	rtol	- relative convergence tolerance
	stol	- convergence tolerance in terms of the norm of the change in the solution between steps
	maxit	- maximum number of iterations
	maxf	- maximum number of function evaluations

Notes

The user can specify PETSC_NULL for any parameter that is not needed.

Keywords

SNES, nonlinear, get, convergence, tolerances

Examples