petsc-3.7.5 2017-01-01

SNESLineSearchSetTolerances

Gets the tolerances for the linesearch. These include tolerances for the relative and absolute change in the function norm, the change in lambda for iterative line searches, the minimum steplength, the maximum steplength, and the maximum number of iterations the line search procedure may take.

Synopsis

#include "petscsnes.h" 
PetscErrorCode  SNESLineSearchSetTolerances(SNESLineSearch linesearch,PetscReal steptol,PetscReal maxstep, PetscReal rtol, PetscReal atol, PetscReal ltol, PetscInt max_its)

Input Parameters

	linesearch	- linesearch context
	steptol	- The minimum steplength
	maxstep	- The maximum steplength
	rtol	- The relative tolerance for iterative line searches
	atol	- The absolute tolerance for iterative line searches
	ltol	- The change in lambda tolerance for iterative line searches
	max_it	- The maximum number of iterations of the line search

Notes

The user may choose to not set any of the tolerances using PETSC_DEFAULT in place of an argument.

SNESLineSearchSetTolerances

Synopsis

Input Parameters

Notes

See Also