A new technique breaks Dijkstra's 70-year-old record: it finds routes faster in huge networks, changing graph theory forever.

If you’ve been making the same commute for a long time, you’ve probably settled on what seems like the best route. But “best” is a slippery concept. Perhaps one day there’s an accident or road closure ...

references therein), not much has been done to date for efficiently solving the project scheduling problem in AND-OR graphs. A special case, in which arc lengths are positive, has been studied by ...