You searched for: “quod erat demonstrandum
Quod erat demonstrandum.
1. "That which was to be proven."
2. A phrase used to signal that a proof has just been completed.
3. Used in a formal conclusion to indicate that something; such as, evidence of a fact is proof of the theory that has just been been advanced.
This entry is located in the following units: demonstra- (page 1) monstro-, monstr-, mone-, monu-, moni- (page 3)
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."

Word Entries at Get Words: “quod erat demonstrandum
Q.E.D., quod erat demonstrandum
which was to be demonstrated
This entry is located in the following unit: Abbreviations Frequently Encountered (page 3)