On 4/21/2019 6:31 PM, [email protected] wrote:
*Here's something odd. At 9:45 in Susskind's Lecture 2 on GR, he says the metric tensor is a Kronecker delta function. But I could swear that the diagonal of -1,1,1,1 represents flat space in SR. AG *
What's odd about that? Flat space is just special case of curved space in which the curvature is zero.
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