Captions provided by CCTubes – Captioning the Internet! With Dr Holly Krieger from Murray Edwards College, University of Cambridge.
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Some more reading on the topic: http://www.ams.org/journals/bull/2004-41-01/S0273-0979-03-00993-5/S0273-0979-03-00993-5.pdf
Open Problems Group on Brilliant: https://brilliant.org/groups/open-problems-group
Editing and animation by Pete McPartlan
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