The irst international con erence on differential games was held at Amherst, Massachusetts, in September 1969. A second meeting, partially supported by N.A.T.O., was held in Varenna, Italy, in June 1970. At these conferences many new theoretical results and applications, especially in economic problems, were presented. The present volume consists o the lectures presented at a N.A.T.O. Advanced Study Institute on the "Theory and Applications of Differential...