We start the numbering with zero because this chapter is preparatory. At the beginning of each chapter we want to make some general introductory remarks because, we think, the reader has a right to know in advance why the material that follows is presented to him. We begin with an introduction into the history of quantum field theory. To understand the striking success of this theory, it is helpful and clarifying to remember how the fundamental ideas have been introduced in the past and how they got modified in the course of time. After this historical introduction of those concepts we start with their physical introduction.
KeywordsMinkowski Space Lorentz Transformation Quantum Electrodynamic Interaction Versus Lorentz Boost
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