petsc-3.7.1 2016-05-15
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SNESLineSearchGetTolerances

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  SNESLineSearchGetTolerances(SNESLineSearch linesearch,PetscReal *steptol,PetscReal *maxstep, PetscReal *rtol, PetscReal *atol, PetscReal *ltol, PetscInt *max_its)

Input Parameters

linesearch -linesearch context Many br

Output Parameters

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

Many br

Notes

Different line searches may implement these parameters slightly differently as Many brthe type requires. Many br

See Also

SNESLineSearchSetTolerances()

Level:intermediate
Location:
src/snes/linesearch/interface/linesearch.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages