# DMPlexConstructCohesiveCells
Construct cohesive cells which split the face along an internal interface 
## Synopsis
```
#include "petscdmplex.h"    
#include "petscdmlabel.h"   
PetscErrorCode DMPlexConstructCohesiveCells(DM dm, DMLabel label, DMLabel splitLabel, DM *dmSplit)
```
Collective on dm


## Input Parameters

- ***dm -*** The original DM
- ***label -*** The label specifying the boundary faces (this could be auto-generated)



## Output Parameters

- ***splitLabel -*** The label containing the split points, or NULL if no output is desired
- ***dmSplit -*** The new DM





## See Also
 `DMCreate()`, `DMPlexLabelCohesiveComplete()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexsubmesh.c.html#DMPlexConstructCohesiveCells">src/dm/impls/plex/plexsubmesh.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexsubmesh.c.html#DMPlexConstructCohesiveCells_Internal">DMPlexConstructCohesiveCells_Internal in src/dm/impls/plex/plexsubmesh.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/plex/plexsubmesh.c)


[Index of all DMPlex routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)