Hi all, in the premises of my experimental sessions, I would need to compute the topological center of an instantiated ns topology. We are talking about huge random graphs (gtitm generated), so no chance to do this analytically. Has anybody implemented any code for specifying the topological center of an instantiated ns topology? If not , any hints where to start looking at for implementing this myself? It suffices to do the computation once at start. Also the type of the algorithm (distributed, offline etc.) does not matter, all I need is the center of a static graph. Thanks, Lugozi --------------------------------- Brings words and photos together (easily) with PhotoMail - it's free and works with Yahoo! Mail.