Classical Field Theory and the Stress-Energy Tensor (Second Edition)

Classical Field Theory and the Stress-Energy Tensor (Second Edition) is an introduction to classical field theory and the mathematics required
to formulate and analyze it. The development of the mathematical formalism,
previously in an appendix, is integrated into the presentation of the physical
concepts. The book develops the core concepts of field theory by applying
Newtonian physics to the stretched string, emphasizing the relationship between
fields and the observer's coordinate system...