petsc-master 2019-09-18
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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
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Index of all manual pages