quod erat faciendum
In mathematics , an algorithm is traditionally concluded with the Latin phrase quod erat faciendum ( q. E. F. ) ( Dt. What was to be done ; ancient Gr . Ὅπερ ἔδει ποιῆσαι hoper edei poiēsai ). It goes back to the Greek geometers and in particular to Euclid , who ended exemplary geometric constructions in this way .
See also
- quod erat demonstrandum (q. e. d.)
- fecit - artist's signature
