KSPOrthogonalizationGet

Gets the orthogonalization routine used by KSPGMRES and other solvers.

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPOrthogonalizationGet(KSP ksp, KSPOrthogonalizationFn **orthog)

Not Collective

Input Parameter

• ksp - the Krylov space solver context

Output Parameter

• orthog - orthogonalization function; see KSPOrthogonalizationFn for the calling sequence

Notes

Two orthogonalization routines are predefined, KSPOrthogonalizationModifiedGramSchmidt() and the default KSPOrthogonalizationClassicalGramSchmidt().

Use KSPOrthogonalizationSetCGSRefinementType() to determine if iterative refinement is used to increase stability.

See Also

KSP: Linear System Solvers, KSPOrthogonalizationFn, KSPOrthogonalizationSetCGSRefinementType(), KSPOrthogonalizationClassicalGramSchmidt(), KSPOrthogonalizationModifiedGramSchmidt()

Level

intermediate

Location

src/ksp/ksp/interface/orthog.c

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Index of all KSP routines
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Index of all manual pages