KSPSetConvergedNegativeCurvature#

Allows to declare convergence and return KSP_CONVERGED_NEG_CURVE when negative curvature is detected

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPSetConvergedNegativeCurvature(KSP ksp, PetscBool flg)

Collective

Input Parameters#

  • ksp - iterative context

  • flg - the Boolean value

Options Database Key#

  • -ksp_converged_neg_curve - Declare convergence if negative curvature is detected

Note#

This is currently used only by a subset of the Krylov solvers, namely KSPCG, KSPSTCG, KSPQCG, KSPGLTR, KSPNASH, and KSPMINRES.

See Also#

KSP: Linear System Solvers, KSP, KSPConvergedReason, KSPGetConvergedNegativeCurvature()

Level#

advanced

Location#

src/ksp/ksp/interface/iterativ.c

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