This theorem and a whole bunch of other cool math easter eggs are described in The Simpsons and Their Mathematical Secrets by Simon Singh, which I highly recomm

This theorem and a whole bunch of other cool math easter eggs are described in The Simpsons and Their Mathematical Secrets by Simon Singh, which I highly recommend. Despite the name, it includes some stories from Futurama, which makes sense given how similar the writing teams were. It's incredible how many sophisticated jokes the writers managed to work in! I really love how both shows were able to be funny without dumbing down the content.