petsc-master 2016-02-12
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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.


#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


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

See Also


Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages