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# DMPlexPartitionLabelInvert
Create a partition label of remote roots from a local root label 
## Synopsis
```
#include "petscdmplex.h"   
PetscErrorCode DMPlexPartitionLabelInvert(DM dm, DMLabel rootLabel, PetscSF processSF, DMLabel leafLabel)
```

## Input Parameters

- ***dm        -*** The `DM`
- ***rootLabel -*** `DMLabel` assigning ranks to local roots
- ***processSF -*** A star forest mapping into the local index on each remote rank



## Output Parameter

- ***leafLabel -*** `DMLabel` assigning ranks to remote roots





## Note
The rootLabel defines a send pattern by mapping local points to remote target ranks. The
resulting leafLabel is a receiver mapping of remote roots to their parent rank.


## See Also
 [](ch_unstructured), `DM`, `DMPLEX`, `DMPlexPartitionLabelCreateSF()`, `DMPlexDistribute()`, `DMPlexCreateOverlap()`

## Level
developer

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


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


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