On Wed, Aug 15, 2001 at 10:39:22PM -0400, Valdis wrote: > yeah, but can they utilize structural holes? ;-) Don't let the article mislead you. ACO is a heuristic method used to tackle computationally hard problems - shortest paths (a.k.a. geodesics) do not belong in that category. The traveling salesman problem is to find a shortest tour visiting each node exactly once, which is decisively different from finding a shortest path from one node to another. B.