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| M.C. Escher, Reptiles, 1943 |
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| M. C. Escher, Drawing Hands, (lithograph, 1948) |
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| Abstract diagram of M. C. Escher's Drawing Hands. On top, a seeming paradox. Below, its resolution. Douglas Hofstadter |
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| Twelve self-engulfing TV screens. I would have included one more, had 13 not been prime. Douglas Hofstadter |
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| triangolo di Sierpinski |
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| Alexandre Duret-Lutz, Recursive Blanket Flower |
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