petsc-master 2019-10-20
Report Typos and Errors

PCDeflationSetCorrectionFactor

Set coarse problem correction factor. The Preconditioner becomes P*M^{-1} + fact*Q.

Synopsis

#include "petscksp.h" 
PetscErrorCode PCDeflationSetCorrectionFactor(PC pc,PetscScalar fact)
Logically Collective

Input Parameters

pc - the preconditioner context
fact - correction factor

Options Database Keys

-pc_deflation_correction <false> - if true apply coarse problem correction
-pc_deflation_correction_factor <1.0> - sets coarse problem correction factor

Notes

Any non-zero fact enables the coarse problem correction.

See Also

PCDEFLATION

Level

intermediate

Location

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

Implementations

PCDeflationSetCorrectionFactor_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