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JonnieCache
on Sept 15, 2014
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Show HN: Explore tilings of the hyperbolic plane b...
This reminds me of Roger Penrose's spacetime diagrams.
http://copaseticflow.blogspot.co.uk/2014/07/nine-notes-about...
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http://copaseticflow.blogspot.co.uk/2014/07/nine-notes-about...