Enter a clue or pattern or both:
The Clue
Letters of triumph (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.
Geometry abbr.
Geometry letters
Latin abbr.
Logical conclusion
Logician's abbr.
Logician's letters
Logician's signoff
Math abbr.
Math finale
Math initials
Math. initials
Math proof
Mathematician's letters
Proof ender
Proof ending
Proof finale
Proof finish
Proof letters
Proof's end
"Proved!" letters
As shown, for short
Triumphant end?
Abbr. at the end of a proof
Geometer's sign-off
Letters after a proof
Letters at the end of a proof
Math journal letters
Math-proof initials
Mathematical proof letters
Mathematician's sign-off
Mathematician's "ta-da!"
Mathematician's "ta-da"
Relative of "Voilà!"
Proof-ending letters
Proof finale letters
Letters seen by a proof reader?
Abbr. after a series of equations, maybe
Last thing seen by a proof reader?
Definition
QED as a noun:
1. (quantum electrodynamics, QED) = a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons