KSPSetUseFischerGuess#

Use the Paul Fischer algorithm or its variants to compute initial guesses for a set of solves with related right hand sides

Synopsis#

#include "petscksp.h" 
PetscErrorCode KSPSetUseFischerGuess(KSP ksp, PetscInt model, PetscInt size)

Logically Collective

Input Parameters#

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

See Also#

KSP: Linear System Solvers, KSP, KSPSetOptionsPrefix(), KSPAppendOptionsPrefix(), KSPSetGuess(), KSPGetGuess(), KSPGuess

Level#

advanced

Location#

src/ksp/ksp/interface/itcl.c

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