Look up: q.e.d.

1. Q.E.D.
   Quod erat demonstrandum, Q.E.D., QED Which was the thing to be demonstrated; Which was to be demonstrated. A formula appended at the end of a proof in geometry, or other mathematical solution, with the meaning, 'We have proven the proposition we set out to prove.'
   Found on http://www.wordinfo.info/words/index/inf
   
   
2. Q.E.D.
   `Q.E.D.` is an initialism of the `quod erat demonstrandum`-->, which translates as "which was to be demonstrated". The phrase is traditionally placed in its abbreviated form at the end of a mathematical proof or philosophical argument when what was specified in the enunciation &...
   Found on http://en.wikipedia.org/wiki/Q.E.D.
   
   
3. Q.E.D.
   (U.S. TV series) `Q.E.D.` was a 1982 short-lived adventure series set in Edwardian England, starring Sam Waterston as Professor Quentin Everett Deverill (the series title is the character`s initials). The Professor was a scientific detective in the mold of Sherlock Holmes, and the seri...
   Found on http://en.wikipedia.org/wiki/Q.E.D.
   
   
4. Q.E.D.
   (manga) is a detective manga by Motohiro Katou. The main character Sou Touma encounters a variety of mystery cases. Sou often works in tandem with his friend and potential love interest Kana, with him supplying the brain while she acts as brawn. In 2009, the manga won the Kodansha Manga Award...
   Found on http://en.wikipedia.org/wiki/Q.E.D.