Given the magnitude of a proper acceleration, the derivative of proper velocity with respect to proper time, how do you determine what component is from the spatial vs temporal dimensions. I am led to believe from wikipedia that the temporal component is zero, however do not understand why. Is this always true?
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Hi. Maybe you should start with understanding what a derivative actually means? https://en.wikipedia.org/wiki/Derivative#Rigorous_definition – Gert Sep 18 '15 at 02:04
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Perhaps this might help.http://physics.stackexchange.com/questions/68108/why-proper-acceleration-is-du-dt-and-not-du-d-tau – praeseo Sep 18 '15 at 07:16