The concept of phase space plays a decisive role in the study of the transition from classical to quantum physics. This is particularly the case in areas such as nonlinear dynamics and chaos, geometric quantization and the study of the various semi-classical theories, which are the setting of the present volume. Much of the content is devoted to the study of the Wigner distribution. This volume gives the first complete survey of the progress made by both mathematicians and physicists. It will serve as an excellent reference for further research.

The book begins with a personal tribute to Warren E. Henry and a reprint of one of his influential papers from "Physical" "Review." The following proceedings give a comprehensive view of recent research on the topic of magnetism, including topics from theoretical and experimental perspectives. Contributions include papers on the theoretical relationship between magnetic phenomena and superconductivity, a new class of magnetic materials produced by molecular beam epitaxy, non-linear phenomena in magnetization fields, quantum chaos in magnetic phenomena, and magnetic devices and anisotropy. The volume brings together original papers written by experts in various areas of the field of magnetism. This is one of the first books in recent years to treat all facets of the field of magnetics. The book will be a useful survey for researchers, engineers and graduate students.

The original idea of the organizers of the Washington Symposium was to span a fairly narrow range of topics on some recent techniques developed for the investigation of nonlinear partial differential equations and discuss these in a forum of experts. It soon became clear, however, that the dynamical systems approach interfaced significantly with many important branches of applied mathematics. As a consequence, the scope of this resulting proceedings volume is an enlarged one with coverage of a wider range of research topics.