Re:What Is Gaussian Curvature?
by dade_ on Sunday July 28, 2019 @09:18AM
(#20547380)
Roger Penrose gets to this topic early in his book 'The Road to Reality':
https://www.goodreads.com/book/show/10638.The_Road_to_Realit...
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Also covered by Greg Egan in Chapter 2 of Diaspora, with some accompanying drawings here. https://www.gregegan.net/DIASPORA/02/02.html