STYLE: bandCompression: added comment

src/OpenFOAM/meshes/bandCompression/bandCompression.C

@@ -26,6 +26,7 @@ Description
     matrix is reduced. The algorithm uses a simple search through the
     neighbour list
 
+    See http://en.wikipedia.org/wiki/Cuthill-McKee_algorithm
 
 \*---------------------------------------------------------------------------*/
 

src/OpenFOAM/meshes/bandCompression/bandCompression.H

@@ -46,6 +46,8 @@ namespace Foam
 
 //- Renumbers the addressing to reduce the band of the matrix.
 //  The algorithm uses a simple search through the neighbour list
+//  Returns the order in which the cells need to be visited (i.e. ordered to
+//  original)
 labelList bandCompression(const labelListList& addressing);
 
 } // End namespace Foam