Invariant wave equations : [lecture notes proceedings of the Ettore Majorana "International School of Mathematical Physics, held in Erice, June 27 to July 9, 1977

Introduction to the physical applications of invariant wave equations....Pages 1-23 The general theory of invariant wave equations....Pages 24-59 The external field problem....Pages 60-101 Mathematics of invariant wave equations....Pages 102-142 Method of characteristics in the external field problem or How to recognize an acausal equation when you see one....Pages 143-164 Particles with spin S ⩽ 1 in an external field....Pages 165-196 Nonlinear invariant wave equations....Pages 197-249 Structure properties of solutions of classical non-linear relativistic field equations....Pages 250-262 Relevance of classical solutions to quantum theories....Pages 263-315 Yang mills instantons, geometrical aspects....Pages 316-338 Quantum theory of non-linear invariant wave (field) equations or: Super selection sectors in constructive quantum field theory....Pages 339-413 The S-operator for spin-0 and spin-particles in time-dependent external fields....Pages 414-416