QEF

EnglishEdit

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EtymologyEdit

Latin quod erat faciendum ‎(what was to have been done), from Ancient Greek ὅπερ ἔδει ποιῆσαι ‎(hóper édei poiêsai).

InitialismEdit

QEF

  1. “quod erat faciendum”, “what was to have been done” – used to end a mathematical passage other than a proof.

Usage notesEdit

Much less used than QED. Traditionally used to end passages other than proofs, such as geometric constructions – a “how-to”, not a persuasive argument.

Related termsEdit