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Curved space

That would make the 1938 text a criticism of general rather than special relativity. Tkuvho ( talk) 08:22, 9 May 2013 (UTC) reply

Tau

The text here says

  • such as τ instead of π/2

shouldn't that be

  • such as τ instead of 2π

Naraht ( talk) 18:18, 9 September 2015 (UTC) reply