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300tube Numberphile   26 September, 2017
 789,465

Equally sharing a cake between three people - Numberphile

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This video features Dr Hannah Fry.
More videos with Hannah: http://bit.ly/hannah_vids
Hannah's website: http://www.hannahfry.co.uk
Her book mentioned is "The Mathematics of Love".

Envy free cake cutting (the paper mentioned): https://arxiv.org/abs/1604.03655

A clarifying note from Hannah: n^n^n^n^n^n is the maximum number of cuts in the n person case.

Something we could have made clearer... Bob's trimmed piece still carries the status of his "first choice", so if Charlie leaves it, Bob will (must) pick it... otherwise he'll pick the one that was his original "second choice"... The upshot of this is that there's no chance Alice will be left with the trimmed piece after everyone takes their first piece. And Bob remains envy free under these conditions too.

A trilogy of mathematical cake cutting videos... http://bit.ly/CakeCuttingTrilogy

Editing and animation in this video by Pete McPartlan

Discuss this video on Brady's subreddit: https://redd.it/72jyww

Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile

We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science.

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