28 May
2014
28 May
'14
6:12 a.m.
Fred Lunnon, "Origami torus" math-fun thread, 2009. --Michael On May 27, 2014 11:51 PM, "James Propp" <jamespropp@gmail.com> wrote:
Where can I learn about, and see pictures of, polyhedral surfaces in R^3 that are locally flat (the angles at each vertex add up to 360 degrees) and have the global topology of R^2/Z^2?
More specifically and concretely, how can I crease and fold a square sheet of paper [0,1]x[0,1] so that I can actually glue (t,0) to (t,1) and (0,t) to (1,t) for every t in [0,1]?
Jim Propp _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun