KSPGuessFischerSetModel#

Set the Paul Fischer algorithm or its variants to compute the initial guess for a KSPSolve()

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPGuessFischerSetModel(KSPGuess guess, PetscInt model, PetscInt size)

Logically Collective

Input Parameters#

  • guess - the initial guess context

  • model - use model 1, model 2, model 3, or any other number to turn it off

  • size - size of subspace used to generate initial guess

Options Database Key#

  • -ksp_guess_fischer_model <model,size> - uses the Fischer initial guess generator for repeated linear solves

See Also#

KSP: Linear System Solvers, KSPGuess, KSPGuessCreate(), KSPSetUseFischerGuess(), KSPSetGuess(), KSPGetGuess(), KSP

Level#

advanced

Location#

src/ksp/ksp/guess/impls/fischer/fischer.c

Implementations#

KSPGuessFischerSetModel_Fischer() in src/ksp/ksp/guess/impls/fischer/fischer.c


Index of all KSP routines
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Index of all manual pages