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
Table of Contents for all manual pages
Index of all manual pages