It is proved that average number of edges per voronoi cell in Voronoi diagram is < 6. But can we say the same about the Additive voronoi diagram (variation of voronoi diagram)?
I have this doubt because in Additive voronoi diagram there can be hidden sites. Hence, we cannot claim that there can be (n+1) faces. Then what can we say about average number of edges per voronoi cell of additive voronoi diagram.