acbytesla
Penultimate Amazing
- Joined
- Dec 14, 2012
- Messages
- 41,090
It's an acronym for "quod erat demonstrandum" - which translates as "that which had to be proven". It's most usually used a) classically, at the end of mathematical proofs, and b) more generally, when an argument has been proved. It was employed in the latter sense in this instance![]()
Thank you.