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Invariant (Physics)In physics, invariants are usually quantities conserved (unchanged) by the symmetries of the physical system. (See Noether's theorem.) The correspondence between symmetries and conserved quantities is apparent through conservation laws. Much work has been done, especially in quantum physics, to relate every conserved quantity to some symmetry. One such quantity that still defies all such attempts is mass. Some examples of invariance include: See also:
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