PCAIRSetPolyOrder

Sets the polynomial order used by the PCAIR F-point smoother inverse

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetPolyOrder(PC pc, PetscInt input_int)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_int - the polynomial order

Options Database Key

• -pc_air_poly_order poly_order - the polynomial order if using a polynomial inverse type; defaults to 6

Note

Only affects the polynomial F-point inverse types (see PCAIRSetInverseType()); a higher order gives a more accurate smoother and typically fewer iterations, at the cost of more matrix-vector products per smooth and, unless applied matrix-free, a denser assembled inverse.

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetPolyOrder(), PCAIRSetInverseType(), PCAIRSetCPolyOrder()

Level

intermediate

Index of all PC routines
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Index of all manual pages