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Energy is the time component of 4-momentum in SR: Proof as per R. Wald's book
This is an excerpt fom R. Wald's book on General Relativity (page 61). I'm not able to understand how he deduces that $E$ must be the time component of $p^a$ with only the assertions made before this ...
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Intrinsic Curvature of a Cylinder
I feel that this may be a naïve question, but I am struggling with the concept of intrinsic curvature when applied to the surface of a cylinder. In General Relativity: An Introduction for Physicists, ...
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