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#
KSP: Linear System Solvers, PCTELESCOPE, PCDEFLATION, PCDeflationSetLevels()
Level#
intermediate
Location#
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