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Hello there.

This is Numberphile. We mainly post videos about mathematics and just numbers in general.

Round Peg in a Square Hole

Round Peg in a Square Hole

Additional information

Featuring Tadashi Tokieda - more Tadashi videos at: http://bit.ly/tadashi_vids

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.

Conway Checkers

Conway Checkers

Catalan Conjecture

Catalan Conjecture