A century ago, Emmy Noether published an article, "Invariante Variationsprobleme", which contained 2 theorems on symmetries and conservation laws in the Gottingen Nachrichten. How original, how modern, how influential were her results? Did they shed light on the question of energy conservation that had arisen in the general theory of relativity? I shall comment on the curious transmission of her theorems and the later recognition of their wide applicability in very numerous fields of physics.
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