petsc-3.7.3 2016-07-24
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# DMRefine

Refines a DM object

### Synopsis

    #include "petscdm.h"
    #include "petscdmlabel.h"
    PetscErrorCode  DMRefine(DM dm,MPI_Comm comm,DM *dmf)

Collective on DM

### Input Parameter

| dm | - the DM object
| comm | - the communicator to contain the new DM object (or MPI_COMM_NULL)

### Output Parameter

dmf -the refined DM, or NULL

Note: If no refinement was done, the return value is NULL

### See Also

DMCoarsen(), DMDestroy(), DMView(), DMCreateGlobalVector(), 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

### Examples

src/dm/examples/tutorials/ex3.c.html
src/dm/examples/tutorials/ex65dm.c.html
src/ksp/ksp/examples/tutorials/ex65.c.html
src/snes/examples/tutorials/ex12.c.html
src/snes/examples/tutorials/ex62.c.html
src/snes/examples/tutorials/ex77.c.html