PCCompositeSpecialSetAlphaMat

Sets the matrix alpha_mat used in place of a scalar \(\alpha I\) term for the special composite preconditioner, PC_COMPOSITE_SPECIAL, for \(M + R + S\)

Synopsis

#include "petscksp.h" 
PetscErrorCode PCCompositeSpecialSetAlphaMat(PC pc, Mat alpha_mat)

Logically Collective

Input Parameters

• pc - the preconditioner context

• alpha_mat - the matrix M

See Also

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

Level

developer

Location

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

Examples

src/ksp/pc/tutorials/ex4.c

Implementations

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

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