Symmetry Groups and Their Physical Meaning — General Considerations
In this chapter we again ask the question of what can be learned about a physical system by considering its symmetry properties. The answer to this question was given in 1918 by E. Noether within the framework of variational calculations1. We will restrict ourselves, however, to special cases which are of interest in context with the problems discussed in this book 2. Some facts encountered in this chapter are already well known to us, but this time they will be discussed at a more advanced level.
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