Professor Gerard G. Emch has been one of the pioneers of the C-algebraic approach to quantum and classical statistical mechanics. In a prolific scientific career, spanning nearly five decades, Professor Emch has been one of the creative influences in the general area of mathematical physics. The present volume is a collection of tributes, from former students, colleagues and friends of Professor Emch, on the occasion of his 70th birthday. The articles featured here are a small yet representative sample of the breadth and reach of some of the ideas from mathematical physics.It is also a testimony to the impact that Professor Emch's work has had on several generations of mathematical physicists as well as to the diversity of mathematical methods used to understand them.

The Publications of Gerard G.Emch; Preface; Berezin-Toeplitz Quantization over Matrix Domains; S. Twareque Ali and M. Englis; Partial *-Algebras,A Tool for the Mathematical Description of Physical Systems; Jean-Pierre Antoine; Some Variations on Maxwell's Equations; Giorgio A. Ascoli and Gerald A. Goldin; Physical Applications of Algebras of Unbounded Operators; F. Bagarello. Where's That Quantum?; Stephan De Bievre; Thoughts about Anomalous Diffusion: Time-Dependent; Coefficients versus Memory Functions; V. M. Kenkre and F.J. Sevilla; Infinite Divisibility in Euclidean Quantum Mechanics; John R. Klauder; Adaptive Dynamics and its Application to Chaos; Masanori Ohya; The C* Axioms and the Phase Space Fomalism of Quantum Mechanics; Franklin E. Schroeck, Jr; Stochastic Flow on the Quantum Heisenberg Manifold; Kalyan B. Sinha.