KSPGMRESGetOrthogonalization#
Gets the orthogonalization routine used by KSPGMRES and KSPFGMRES.
Synopsis#
#include "petscksp.h"  
PetscErrorCode KSPGMRESGetOrthogonalization(KSP ksp, PetscErrorCode (**fcn)(KSP ksp, PetscInt it))
Not Collective
Input Parameter#
- ksp - iterative context obtained from - KSPCreate()
Output Parameter#
- fcn - orthogonalization function 
Calling sequence of fcn#
- ksp - the solver context 
- it - the current iteration 
Notes#
Two orthogonalization routines are predefined,  KSPGMRESModifiedGramSchmidtOrthogonalization(), and the default
KSPGMRESClassicalGramSchmidtOrthogonalization()
Use KSPGMRESSetCGSRefinementType() to determine if iterative refinement is used to increase stability.
See Also#
KSP: Linear System Solvers, KSPGMRESSetRestart(), KSPGMRESSetPreAllocateVectors(), KSPGMRESSetCGSRefinementType(), KSPGMRESSetOrthogonalization(),
KSPGMRESModifiedGramSchmidtOrthogonalization(), KSPGMRESClassicalGramSchmidtOrthogonalization(), KSPGMRESGetCGSRefinementType()
Level#
intermediate
Location#
Implementations#
KSPGMRESGetOrthogonalization_GMRES() in src/ksp/ksp/impls/gmres/gmres.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages