PCDeflationSetReductionFactor#

Set reduction factor for the PCDEFLATION

Synopsis#

#include "petscksp.h" 
PetscErrorCode PCDeflationSetReductionFactor(PC pc, PetscInt red)

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#

PCTELESCOPE, PCDEFLATION, PCDeflationSetLevels()

Level#

intermediate

Location#

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

Implementations#

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

Index of all PC routines
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Index of all manual pages