QED

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English[edit]

Wikipedia has an article on:

Wikipedia

Interjection[edit]

QED

  1. Quod erat demonstrandum (Latin what had to be proved or what was to be demonstrated).

Usage notes[edit]

When used to end a mathematical proof, QED is somewhat archaic or traditional; textbooks often use a graphical symbol instead. Further, other languages generally use a vernacular abbreviation, such as French CQFD (ce qu'il fallait démontrer); QED is primarily used in English and Hungarian.

Related terms[edit]

  • (what was to be demonstrated): QEF

Translations[edit]

Noun[edit]

QED

  1. Quantum electrodynamics.
    • 2011, Brian Cox & Jeff Forshaw, The Quantum Universe, Allen Lane 2011, p. 176:
      QED is the theory that explains how electrically charged particles, like electrons, interact with each other and with particles of light (photons).

Related terms[edit]

  • (quantum): QCD

Anagrams[edit]


Latin[edit]

Latin Wikipedia has an article on:

Wikipedia la

Initialism[edit]

QED

  1. QED