PCAIRSetConstrainZ

Sets whether PCAIR applies constraints to the restrictor

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetConstrainZ(PC pc, PetscBool input_bool)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_bool - PETSC_TRUE to apply constraints to the restrictor

Options Database Key

• -pc_air_constrain_z (true|false) - apply constraints to the restrictor; defaults to false

Note

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

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetConstrainZ(), PCAIRSetConstrainW(), MatSetNearNullSpace()

Level

advanced

Index of all PC routines
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Index of all manual pages