Thanks another time Mr. Sutton for the answer.
This is my goal:
"I have made a project that use efficiently BGL library. Now I have the necessity to use the Gomory-Hu algorithm......then I have searched on the net  some source "boost compatible" that makes this algorithm ;)"
But nothing, on the net there isn't this function.....I'm surprised because it is a fundamental algorithm of graph theory :o)
Thanks a lot and sorry for my eng :)
Bye.