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To find the Lorentz transformation, should it start with the invariance of the wave-equation ?
If so, then it gives 5 equations, 2 of them being wave-equations again.
If however the invariance of the space-time interval is demanded only 3 quadratic equations come out.
Which way should be taken to start relativity ?
If so, then it gives 5 equations, 2 of them being wave-equations again.
If however the invariance of the space-time interval is demanded only 3 quadratic equations come out.
Which way should be taken to start relativity ?