petsc-3.9.4 2018-09-11
PCMGGetSmootherDown
Gets the KSP context to be used as smoother before coarse grid correction (pre-smoother).
Synopsis
#include "petscksp.h"
PetscErrorCode PCMGGetSmootherDown(PC pc,PetscInt l,KSP *ksp)
Not Collective, KSP returned is parallel if PC is
Input Parameters
| pc | - the multigrid context
|
| l | - the level (0 is coarsest) to supply
|
Ouput Parameters
ksp -the smoother
Notes: calling this will result in a different pre and post smoother so you may need to
set options on the post smoother also
Keywords
MG, multigrid, get, smoother, down, pre-smoother, level
See Also
PCMGGetSmootherUp(), PCMGGetSmoother()
Level
advanced
Location
src/ksp/pc/impls/mg/mgfunc.c
Examples
src/snes/examples/tutorials/ex12.c.html
Index of all PCMG routines
Table of Contents for all manual pages
Index of all manual pages