petsc-3.7.3 2016-08-01
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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
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex12.c.html