It means 'which was to be demonstrated'; in other words, 'we have proved what we set out to prove'.
Quod Erat Demonstrandum is usually abbreviated thusly: Q.E.D.
QED means quod erat demonstrandum- which was to be demonstrated
I came, I saw, I conquered
quod erat demonstrandum (latin), meaning "which had to be demonstrated"
Q.E.D is Latin for "quod erat demonstrandum" which translates into either "which was to be demonstrated" or "thus it is demonstrated.
Q.E.D is from the Latin, "quod erat demonstrandum." It means, "that which was to be demonstrated," and is the standard way of ending the proving of a theorem.
amaterat as is quod erat demonstrandum which we use in math
QED from the Latin "quod erat demonstrandum", meaning "that which was to be demonstrated", normally put at the end of a mathematical proof
Q.e.d. stands for latin "Quod erat demonstrandum". It is used at the end of mathematical proofs to indicate, that we have proved what we were supposed to.
Quod erat faciendum in Latin is "That which was to be done" in English.
quod erat demondstrandum
AnswerQED is an abbreviation for the Latin "quod erat demonstrandum" (literally, "which was to be demonstrated" or "thus it is demonstrated". It is used at the end of a proof or logical argument by the author to state that he has reached the end of his argument and proven his case.AnswerOr it could be quantum electrodynamics.