Sunday, August 7, 2016

mathematical physics - Is the converse of Noether's first theorem true: Every conservation law has a symmetry?



Noether's (first) theorem states that any differentiable symmetry of the action of a physical system has a corresponding conservation law.


Is the converse true: Any conservation law of a physical system has a differentiable symmetry of its action?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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