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内容説明 Available for the first time in paperback， The Quantum Theory of Fields is a self-contained， comprehensive， and up-to-date introduction to quantum field theory from Nobel Laureate Steven Weinberg. Volume I introduces the foundations of quantum field theory. The development is fresh and logical throughout， with each step carefully motivated by what has gone before. After a brief historical outline， the book begins with the principles of relativity and quantum mechanics， and the properties of particles that follow. Quantum field theory emerges from this as a natural consequence. The classic calculations of quantum electrodynamics are presented in a thoroughly modern way， showing the use of path integrals and dimensional regularization. It contains much original material， and is peppered with examples and insights drawn from the author’s experience as a leader of elementary particle research. Exercises are included at the end of each chapter.