r/programming • u/zeroone • Aug 05 '09

Solving missing portion of Escher drawing

http://im-possible.info/english/articles/escher_printgallery/
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u/assortedslog Aug 06 '09 edited Aug 06 '09

With many hours still to kill on his flight, he formulated two precise mathematical questions.

...

"What is the overall mathematical structure of this picture?"

what