TaoSetTolerances#
Sets parameters used in TaoSolve()
convergence tests
Synopsis#
#include "petsctao.h"
PetscErrorCode TaoSetTolerances(Tao tao, PetscReal gatol, PetscReal grtol, PetscReal gttol)
Logically Collective
Input Parameters#
tao - the
Tao
contextgatol - stop if norm of gradient is less than this
grtol - stop if relative norm of gradient is less than this
gttol - stop if norm of gradient is reduced by this factor
Options Database Keys#
-tao_gatol
- Sets gatol-tao_grtol
- Sets grtol-tao_gttol
- Sets gttol
Stopping Criteria#
||g(X)|| <= gatol
||g(X)|| / |f(X)| <= grtol
||g(X)|| / ||g(X0)|| <= gttol
Note#
Use PETSC_DEFAULT
to leave one or more tolerances unchanged.
See Also#
TAO: Optimization Solvers, Tao
, TaoConvergedReason
, TaoGetTolerances()
Level#
beginner
Location#
Examples#
src/tao/constrained/tutorials/ex1.c
src/tao/constrained/tutorials/maros.c
src/tao/unconstrained/tutorials/burgers_spectral.c
src/tao/unconstrained/tutorials/rosenbrock2.c
src/tao/unconstrained/tutorials/rosenbrock3.c
src/tao/unconstrained/tutorials/spectraladjointassimilation.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages