KSPCGSetObjectiveTarget#
Sets the target value for the CG quadratic model
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPCGSetObjectiveTarget(KSP ksp, PetscReal obj)
Logically Collective
Input Parameters#
ksp - the iterative context
obj - the objective value (0 is the default)
Notes#
The KSPSolve() will stop when the current value of the objective function \(\frac{1}{2} x^H_k A x_k - b^H x_k\)
is smaller than obj if obj is negative. Otherwise the test is ignored.
This is used for example inside SNESNEWTONTR.
See Also#
KSP: Linear System Solvers, KSP, KSPCG, KSPNASH, KSPSTCG, KSPGLTR, SNESNEWTONTR
Level#
advanced
Location#
Implementations#
KSPCGSetObjectiveTarget_CG() in src/ksp/ksp/impls/cg/cg.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages