QEF
phraseEtymology From Latin quod erat faciendum (“what was to have been done”), from Ancient Greek ὅπερ ἔδει ποιῆσαι (hóper édei poiêsai).
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“quod erat faciendum”, “what was to have been done” – used to end a mathematical passage other than a proof.
- Related terms
- QED