Hi, I'm starting a double degree in math and physics and am still a relativity newbie. I'm a bit stuck figuring out what exactly means to drop absolute time and simultaneity when making the transition from Galilean spacetime to Minkowski spacetime. Judging from the purely mathematical perspective it looks to me more accurate to say that for timelike paths the change is from a unique preferred frame corresponding to aunique simultaneity slicing in the Galilean case to a whole family of equivalently preferred frames in special relativity corresponding to an infinity of possible simultaneity slicings determining the possible three velocities < c at each point while the conformal structure determined by the indefinite signature allows to keep the relativity principle. Is this about right?(adsbygoogle = window.adsbygoogle || []).push({});

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# I Going from Galilei to Minkowski

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