PCDeflationSetReductionFactor#

Set reduction factor for the PCDEFLATION

Synopsis#

Logically Collective

Input Parameters#

  • pc - the preconditioner context

  • red - reduction factor (or PETSC_DETERMINE)

Options Database Key#

  • -pc_deflation_reduction_factor <-1> - reduction factor on bottom level coarse problem for PCDEFLATION

Note#

Default is computed based on the size of the coarse problem.

See Also#

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

Level#

intermediate

Location#

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

Implementations#

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


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