I'm trying to read Greg Egan's Diaspora for the third time now. The first two times I got about halfway thru and then I got stuck on some math in the book.

This time it's gonna be different. This time I've got Egan's website to refer to.

For instance, in Chapt. 2, there's a section that goes on about flattening a torus. While I sorta understood that one, taking it to the next step on why you can't flatten a sphere always stumped me. Now I've got it drawn out for me. This rewls!