PCAIRSetImproveZIts

Sets the number of Richardson iterations used by PCAIR to improve the approximate restrictor

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetImproveZIts(PC pc, PetscInt input_int)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_int - the number of Richardson iterations

Options Database Key

• -pc_air_improve_z_its its - number of Richardson iterations to improve the approximate restrictor, using the existing Z as the initial guess; defaults to 0

Note

The Richardson iteration is preconditioned with the diagonal of the approximate inverse of Aff.

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetImproveZIts(), PCAIRSetImproveWIts()

Level

advanced

Index of all PC routines
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Index of all manual pages