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In this wikipedia page, it says that one can derive the spacetime interval between 2 arbitrary events from the second postulate of special relativity, together with the homogeneity of spacetime and the isotropy of space.

How exactly is this done?

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  • $\begingroup$ I think you should make your assumptions more precise. How much physical meaning for the metric/spacetime-interval do you start out with? Depending on that this might end up being a conceptually pretty difficult question. Also "The second postulate of SR" is I assume that the speed of light is the same for all inertial observers? I'm not aware that there is a universally accepted "ordering of SR postulates" like there is for Newton's Axioms for example. $\endgroup$ – Adomas Baliuka Jan 28 '17 at 22:14
  • $\begingroup$ en.wikipedia.org/wiki/… $\endgroup$ – user126422 Jan 28 '17 at 22:56

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