diff --git a/Solver/groupOfElements.h b/Solver/groupOfElements.h
index f6b31021c751cd756aa3171874fbe50eef001c1e..92bc3a86fa266d52048b895c01ff2f312859166e 100644
--- a/Solver/groupOfElements.h
+++ b/Solver/groupOfElements.h
@@ -65,6 +65,11 @@ class groupOfElements {
     return (_elements.find(e) != _elements.end());
   }
   
+  bool find (MVertex *v) const       
+  {
+    return (_vertices.find(v) != _vertices.end());
+  }
+  
   inline void insert (MElement *e)
   {
     _elements.insert(e);