What is the difference between qef and qed?
qef | qed | Related terms |
“quod erat faciendum”, “what was to have been done” – used to end a mathematical passage other than a proof.
Quod erat demonstrandum (Latin what had to be proved'' or ''what was to be demonstrated ).
Quantum electrodynamics.
* 2011 , & Jeff Forshaw, The Quantum Universe , Allen Lane 2011, p. 176:
Qed is a related term of qef.
As an initialism QEF
is “quod erat faciendum”, “what was to have been done” – used to end a mathematical passage other than a proof.As an interjection QED is
quod erat demonstrandum (Latin what had to be proved or what was to be demonstrated).As a noun QED is
quantum electrodynamics.qef
English
Initialism
(Initialism) (head)Usage notes
Much less used than QED. Traditionally used to end passages other than proofs, such as geometric constructions – a “how-to”, not a persuasive argument.qed
English
(wikipedia QED)Alternative forms
Interjection
(en-interjection)Usage notes
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 ; QED is primarily used in English and Hungarian.Noun
(head)- QED is the theory that explains how electrically charged particles, like electrons, interact with each other and with particles of light (photons).