petsc-3.13.6 2020-09-29
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PCDeflationSetReductionFactor
Set reduction factor for the bottom
PCTELESCOPE
coarse problem solver.
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 Keys
-pc_deflation_reduction_factor <-1>
-reduction factor on bottom level coarse problem for
PCTELESCOPE
Notes
Default is computed based on the size of the coarse problem.
See Also
PCTELESCOPE
,
PCDEFLATION
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
Table of Contents for all manual pages
Index of all manual pages