Physical Reality and Mathematical Description

This collection of essays is intended as a tribute to Josef Maria Jauch on his sixtieth birthd~. Through his scientific work Jauch has justly earned an honored name in the community of theo­ retical physicists. Through his teaching and a long line of dis­ tinguished collaborators he has put an imprint on modern mathema­ tical physics. A number of Jauch's scientific collaborators, friends and admirers have contributed to this collection, and these essays reflect to some extent Jauch's own wide in