petsc-3.13.6 2020-09-29
DMCreateRestriction
Gets restriction matrix between two DM objects
Synopsis
#include "petscdm.h"
#include "petscdmlabel.h"
#include "petscds.h"
PetscErrorCode DMCreateRestriction(DM dmc,DM dmf,Mat *mat)
Collective on dmc
Input Parameter
| dmc | - the DM object
|
| dmf | - the second, finer DM object
|
Output Parameter
mat -the restriction
Notes
For DMDA objects this only works for "uniform refinement", that is the refined mesh was obtained DMRefine() or the coarse mesh was obtained by
DMCoarsen(). The coordinates set into the DMDA are completely ignored in computing the interpolation.
See Also
DMDestroy(), DMView(), DMCreateGlobalVector(), DMCreateColoring(), DMCreateMatrix(), DMRefine(), DMCoarsen(), DMCreateInterpolation()
Level
developer
Location
src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages