The idea of devoting a complete book to this topic was born at one of the Workshops on Nonlinear and Turbulent Processes in Physics taking place reg ularly in K

Some of the most active practitioners in the field of integrable systems have been asked to describe what they think of as the problems and results which seem t

This book introduces the reader to basic notions of integrable techniques for one-dimensional quantum systems. In a pedagogical way, a few examples of exactly s

In the past few decades many attempts have been made to search for a consistent formulation of quantum field theory beyond perturbation theory. One of the most

Proceedings of a NATO ARW held in Como, Italy, September 14-19, 1992