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Penrose Tiles to Trapdoor Ciphers: And the Return of Dr Matrix (Spectrum)
 
 
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Penrose Tiles to Trapdoor Ciphers: And the Return of Dr Matrix (Spectrum) (Paperback)

by Martin Gardner (Author) "At the end of a 1975 Scientific American column on tiling the plane periodically with congruent convex polygons (reprinted in my Time Travel and Other..." (more)
Key Phrases: infinite cartwheel pattern, smallest complete graph, force nonperiodicity, Scientific American, Journal of Combinatorial Theory, Wythoff's Nim (more...)
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