PCDeflationSetCorrectionFactor#

Set coarse problem correction factor. The preconditioner becomes PM^{-1} + factQ.

Synopsis#

Logically Collective

Input Parameters#

  • pc - the preconditioner context

  • fact - correction factor

Options Database Keys#

  • -pc_deflation_correction - if true apply coarse problem correction

  • -pc_deflation_correction_factor <1.0> - sets coarse problem correction factor

Note#

Any non-zero fact enables the coarse problem correction.

See Also#

KSP: Linear System Solvers, PCDEFLATION, PCDeflationSetLevels(), PCDeflationSetReductionFactor()

Level#

intermediate

Location#

src/ksp/pc/impls/deflation/deflation.c

Implementations#

PCDeflationSetCorrectionFactor_Deflation() in src/ksp/pc/impls/deflation/deflation.c


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