Gauss Sums, Kloosterman Sums, and Monodromy Groups. (Am-116), Volume 116The study of exponential sums over finite fields, begun by Gauss nearly two centuries ago, has been completely transformed in recent years by advances in algebraic geometry, culminating in Deligne's work on the Weil Conjectures. It now appears as a very attractive mixture of algebraic geometry, representation theory, and the sheaf theoretic incarnations of such standard constructions of classical analysis as convolution and Fourier transform. The book