Semi-Classical Approximation in Quantum Mechanics

This volume is concerned with a detailed description of the canonical operator method - one of the asymptotic methods of linear mathematical physics. The book is, in fact, an extension and continuation of the authors' works [59], [60], [65]. The basic ideas are summarized in the Introduction. The book consists of two parts. In the first, the theory of the canonical operator is develop­ ed, whereas, in the second, many applications of the canonical operator method to concrete problems of mat...