ネーターの定理
1. Noether's theoremNoether's (first) theorem states that any differentiable symmetry of the action of a physical system has a corresponding conservation law. The theorem was proved by German mathematician Emmy Noether in 1915 and published in 1918. The action of a physical system is the integral over time of a Lagrangian function (which may or may not be an integral over space of a Lagrangian density function), from which the system's behavior can be determined by the principle of least action.
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Read “Noether's theorem” on English Wikipedia
Read “ネーターの定理” on Japanese Wikipedia
Read “Noether's theorem” on DBpedia
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