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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...
Re:What Is Gaussian Curvature? by hyt7u on Sunday July 28, 2019 @12:07PM (#20548204)
Also covered by Greg Egan in Chapter 2 of Diaspora, with some accompanying drawings here. https://www.gregegan.net/DIASPORA/02/02.html