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Feb 13, 2015 at 1:47 comment added Joseph O'Rourke "The middle third is obtained by trimming the edges off the original Möbius loop." This is a key insight for me, stated straightforwardly. Thanks!
Feb 13, 2015 at 1:46 vote accept Joseph O'Rourke
Feb 11, 2015 at 14:39 history answered Richard CC BY-SA 3.0