# DMMoabCheckBoundaryVertices
Check whether a given entity is on the boundary (vertex, edge, face, element) 
## Synopsis
```
#include "petscdmmoab.h"   
PetscErrorCode DMMoabCheckBoundaryVertices(DM dm, PetscInt nconn, const moab::EntityHandle *cnt, PetscBool *isbdvtx)
```

## Input Parameters

- ***dm -*** The DMMoab object
- ***nconn -*** Number of handles
- ***cnt -*** Array of entity handles



## Output Parameter

- ***isbdvtx -*** Array of boundary markers - PETSC_TRUE if entity on boundary; PETSC_FALSE otherwise





## See Also
 `DMMoabIsEntityOnBoundary()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/moab/dmmoab.cxx.html#DMMoabCheckBoundaryVertices">src/dm/impls/moab/dmmoab.cxx</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex35.cxx.html">src/ksp/ksp/tutorials/ex35.cxx.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex36.cxx.html">src/ksp/ksp/tutorials/ex36.cxx.html</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/moab/dmmoab.cxx)


[Index of all DMMOAB routines](index.md)  
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