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This book is a survey of methods used in the study of two-dimensional models in quantum field theory as well as applications of these theories in physics. It covers the subject since the first model, studied in the fifties, up to modern developments in string theories, and includes exact solutions, non-perturbative methods of study, and nonlinear sigma models.

“The authors have made a great effort to present in a careful and systematic way such a complete treatise for the benefit of non-specialists. This book is thus of great value to students and research physicists interested in two-dimensional quantum field theory. Numerous (15) useful appendices help the reader to understand and rederive the results at will, making the book self-contained.”