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Jul 4, 2017 at 17:19 comment added Rexcirus The standard reference is Wald, General Relativity.
Jul 4, 2017 at 16:36 comment added magma Nice! Where can I read about this definition and related topics (textbook if possible, please)
Jun 30, 2017 at 10:57 vote accept phy_math
Jun 30, 2017 at 9:25 history edited Rexcirus CC BY-SA 3.0
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Jun 30, 2017 at 9:17 history answered Rexcirus CC BY-SA 3.0