In this chapter a few essential facts of classical field theory will be discussed. It will first be shown how to derive the equations of motion of a field theory, for example the Maxwell equations of electrodynamics, from a Lagrangian. Second, the connection between symmetries of the Lagrangian and conservation laws will be discussed. This is one of the central points for all the theoretical developments in this book.
KeywordsField Tensor Symmetry Transformation Classical Field Classical Field Theory Relativistic Field Theory
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