QED

QEDinterjection
Traductions
что и требовалось доказать
The proof is complete, QED.
Доказательство завершено, что и требовалось доказать.
Définitions
Used to indicate that something has been definitively demonstrated, especially at the end of a logical or mathematical proof.
After showing the triangles were congruent, she wrote QED to close the proof.
(informal) Said to emphasize that a point has been conclusively settled.
"You said we’d be late, but we arrived five minutes early—QED!"