QED

Quod erat demonstrandum. --TL

Literally, "that which was to be demonstrated"; used to mark a proposition which has been proven, and whose proof was the object of the exercise.

That's Latin. Latin and logic. <shudder>

"Logic, my dear Zoe, merely enables one to be wrong, with authority." --WJR

Also a TV documentary series, if anyone remembers that... it included, for some reason, the image of a falling apple in its titles. --TL

At least one lecturer I can't think of calls it Quite Easily Done. -- ARC