+void platf_graph_init(unsigned long node_count);
+
+void platf_node_connect(xbt_node_t node1, xbt_node_t node2);
+
+double platf_node_distance(xbt_node_t node1, xbt_node_t node2);
+
+double random_pareto(double min, double max, double K, double P, double ALPHA);