petsc-3.7.7 2017-09-25

SNESNGSGetTolerances

Gets various parameters used in convergence tests.

#include "petscsnes.h"  
PetscErrorCode  SNESNGSGetTolerances(SNES snes,PetscReal *atol,PetscReal *rtol,PetscReal *stol,PetscInt *maxit)

Not Collective

	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

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

SNES, nonlinear, get, convergence, tolerances