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KetilT
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If we have come to realize that energy conservation is not the most general conservation law in our spacetime, isn't it odd that we don't have a simple name for the "real deal"?
I bumped into this thought through Noether's theorem, which relates symmetries in fields to conservation of all kinds of charges for particles. It also applies to symmetries of spacetime, and the most general form seems quite non-trivial:
This is a matter of semantics as much as physics, and I hope you don't mind me posting such a thread. The question is, if this quantity had a short name, what do you think it should be?
I bumped into this thought through Noether's theorem, which relates symmetries in fields to conservation of all kinds of charges for particles. It also applies to symmetries of spacetime, and the most general form seems quite non-trivial:
(Source: Wikipedia)According to general relativity, the conservation laws of linear momentum, energy and angular momentum are only exactly true globally when expressed in terms of the sum of the stress–energy tensor (non-gravitational stress–energy) and the Landau–Lifshitz stress–energy–momentum pseudotensor (gravitational stress–energy)
This is a matter of semantics as much as physics, and I hope you don't mind me posting such a thread. The question is, if this quantity had a short name, what do you think it should be?