Math on TV

Futurama Math Proof

In the Futurama episode The Prisoner of Benda Ken Keeler displays and proves an original theorem in order to advance the plot of the episode.

futurama proof

In the episode, the professor invents a machine that swaps the minds
of two people, but the swap can only happen once for a given pair of
people. The problem posed is:

Given a group of people with swapped minds (with some swapped several times), is it possible to return each mind to their original bodies?
What are necessary conditions?

The theorem provided by Futurama is now named the “Futurama Theorem” and has its own entry on wikipedia! The theorem states that, no matter how many individuals have swapped minds with one another, everyone’s mind can be returned to his or her original body by using only two additional individuals (who have yet to swap minds with anyone).

Futurama screencaps

The first image is “Klein’s Beer”, seen on the TV show, Futurama series 5, episode 3 : The Route of all Evil Seen next to “Olde Fortran Malt Liquour”:

futurama math

futurama math