PCCompositeSpecialSetAlpha#

Sets alpha for the special composite preconditioner, PC_COMPOSITE_SPECIAL, for \(\alpha I + R + S\)

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCCompositeSpecialSetAlpha(PC pc, PetscScalar alpha)

Logically Collective

Input Parameters#

  • pc - the preconditioner context

  • alpha - scale on identity

See Also#

KSP: Linear System Solvers, PCCOMPOSITE, PC_COMPOSITE_ADDITIVE, PC_COMPOSITE_MULTIPLICATIVE, PC_COMPOSITE_SPECIAL, PCCompositeType, PCCompositeSetType(), PCCompositeGetType()

Level#

developer

Location#

src/ksp/pc/impls/composite/composite.c

Implementations#

PCCompositeSpecialSetAlpha_Composite() in src/ksp/pc/impls/composite/composite.c


Index of all PC routines
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Index of all manual pages