Quote by Janus They already exist: $$t = \frac{c}{a} sinh \left( \frac{aT}{c} \right)$$ $$T = \frac{c}{a} sinh^{-1} \left( \frac{at}{c} \right)$$ They are derived from the standard Relativity equations.
Could you please give me an explanation of notations used and if possible,a link to derivations.
And please explain me how somebody knows,who is accelerating?

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