DMMGSetUseGalerkinCoarse

Courses the DMMG to use R*A_f*R^T to form the coarser matrices from finest

Synopsis

#include "petscda.h"   
#include "petscksp.h"  
#include "petscmg.h"   
#include "petscdmmg.h" 
#include "petscpc.h"   
PetscErrorCode PETSCSNES_DLLEXPORT DMMGSetUseGalerkinCoarse(DMMG* dmmg)
Collective on DMMG

Input Parameter

- the context - Options Database Keys:
-dmmg_galerkin -

Notes: After you have called this you can manually set dmmg[0]->galerkin = PETSC_FALSE to have the coarsest grid not compute via Galerkin but still have the intermediate grids computed via Galerkin.

The default behavior of this should be idential to using -pc_mg_galerkin; this offers more potential flexibility since you can select exactly which levels are done via Galerkin and which are done via user provided function.

See Also

DMMGCreate(), PCMGSetGalerkin()

Level:advanced
Location:
src/snes/utils/damg.c
Index of all DA routines
Table of Contents for all manual pages
Index of all manual pages