PCAIRSetCoarsestPolyOrder

Sets the polynomial order used by the PCAIR coarse-grid solver

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetCoarsestPolyOrder(PC pc, PetscInt input_int)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_int - the polynomial order

Options Database Key

• -pc_air_coarsest_poly_order poly_order - the polynomial order of the coarse-grid solver if using a polynomial inverse type; defaults to 6

Note

Only affects the polynomial coarse-grid solver types (see PCAIRSetCoarsestInverseType()); since the coarsest grid is typically small, a higher order here is cheap and can improve the accuracy of the coarse solve.

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetCoarsestPolyOrder(), PCAIRSetPolyOrder(), PCAIRSetCoarsestInverseType()

Level

intermediate

Index of all PC routines
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Index of all manual pages