KSPGuessSetTolerance#

Sets the relative tolerance used in either eigenvalue (POD) or singular value (Fischer type 3) calculations.

Synopsis#

#include "petscksp.h"  
PetscErrorCode KSPGuessSetTolerance(KSPGuess guess, PetscReal tol)

Collective

Input Parameters#

  • guess - KSPGuess object

  • tol - the tolerance

Options Database Key#

  • -ksp_guess_fischer_tol - set the tolerance for the Fischer models

  • -ksp_guess_pod_tol - set the tolerance for the Pod models

Note#

Ignored by the first and second Fischer guess types

See Also#

KSP: Linear System Solvers, KSPGuess, KSPGuessType, KSPGuessSetFromOptions()

Level#

developer

Location#

src/ksp/ksp/interface/iguess.c

Implementations#

KSPGuessSetTolerance_Fischer() in src/ksp/ksp/guess/impls/fischer/fischer.c
KSPGuessSetTolerance_POD() in src/ksp/ksp/guess/impls/pod/pod.c

Index of all KSP routines
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Index of all manual pages