Round Peg in a Square Hole - Numberphileby Numberphile 3 weeks ago
Featuring Tadashi Tokieda - more Tadashi videos at: http://bit.ly/tadashi_vids
More links & stuff in full description below ↓↓↓
Tadashi Tokieda is a Professor of Mathematics at Stanford University (though this was filmed when he was at Cambridge, in the UK).
Animation by Pete McPartlan.
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