This volume is concerned with a detailed description of the canonical operator method - one of the asymptotic methods of linear mathematical physics. The book i

This book presents the basic methods and applications in semiclassical approximation in the light of developments.

This volume deals with those topics of mathematical physics, associated with the study of the Schrödinger equation, which are considered to be the most importa

This book represents the first asymptotic analysis, via completely integrable techniques, of the initial value problem for the focusing nonlinear Schrödinger e

It is a surprising fact that so far almost no books have been published on KAM theory. The first part of this book seems to be the first monographic exposition