Futurama theorem

proper noun

A theorem which proves that, given a mind swap machine that can't be used on the same pair of people more than once, it is possible to reverse any number of mind swaps by introducing two more people that did not have their minds swapped with anyone before.

Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

proper noun
  1. group theoryA theorem which proves that, given a mind swap machine that can't be used on the same pair of people more than once, it is possible to reverse any number of mind swaps by introducing two more people that did not have their minds swapped with anyone before.

Origin

From "The Prisoner of Benda" (2010), season 6, episode 10 of Futurama. The episode and the theorem were written by the mathematician Ken Keeler.

Full word history & related roots →
Cite this entry
APA

Futurama theorem. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Futurama%20theorem

MLA

“Futurama theorem.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Futurama%20theorem. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Futurama theorem,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Futurama%20theorem.

Source: Futurama theorem on Wiktionary, CC BY-SA 4.0.