PCAIRSetConstrainW

Sets whether PCAIR applies constraints to the prolongator

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetConstrainW(PC pc, PetscBool input_bool)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_bool - PETSC_TRUE to apply constraints to the prolongator

Options Database Key

• -pc_air_constrain_w (true|false) - apply constraints to the prolongator; defaults to false

Note

By default this smooths the constant vector and forces the prolongator to interpolate it exactly. Use MatSetNearNullSpace() on the operator matrix to supply other vectors to constrain instead.

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetConstrainW(), PCAIRSetConstrainZ(), MatSetNearNullSpace()

Level

advanced

Index of all PC routines
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Index of all manual pages