The Clue
Abbr. after a series of equations, maybe (3 letter answer)
The Answer
QED
Tags
Notes
The answer QED is seen frequently, appearing about once every 160 puzzles.
Related Clues
End of a demonstration?
End of a proof
Ending letters
Euclidean abbr.
Geometer's P.S.
Geometric postscript
Geometry abbr.
Geometry letters
Letters from a mathematician
Letters to a mathematician
Logical conclusion
Logical ending
Logician's abbr.
Logician's letters
Math. initials
Math proof
Mathematician's abbr.
Mathematician's letters
Proof closer
Proof ender
Proof ending
Proof finale
Proof finish
Proof letters
Proof's end
Proof's ending
"Proved!" letters
Proved, in math.
As shown, for short
Abbr. at the end of a proof
Argument-ending letters
End of a math proof
Finale for a geom. lesson
Geometer's sign-off
Letters after a proof
Letters at the end of a proof
Math-proof initials
Mathematical proof letters
Mathematician's sign-off
Mathematician's "ta-da!"
Proof finale letters
Latin abbr. used in math
Theorem prover's sign-off
Definition
QED as a noun:
1. (quantum electrodynamics, QED) = a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons