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🔬 Quantum physics theory ✅ Proof complete
QED

QED

9.8
A short note put at the end of a proof to show it is finished
  • symbol
  • Specialized
translation icon : Q.E.D.
  • He says QED meaning what was to be proven has been proven, demonstrated quotas, demostratum.

OK, yes, please put a little box or QED just at the end.

Examples

  • OK, yes, please put a little box or QED just at the end.

    Brian McLogan

  • OK, that is the first basic example of an induction proof, and the whole template is now visible, except maybe there should have been a QED or a done statement.

  • The mathematician proudly concluded his proof with a bold QED.

  • After verifying all the calculations, she wrote QED at the end of her thesis.

  • In the final step of the argument, he declared, QED, to indicate that he had proved his point.

Synonyms

there you go
vsQED
  • Informal
426 4.9

Say this to show you have given something or finished a task

is a formal written abbreviation used to close a mathematical proof
there you have it
vsQED
35 6.1

That shows the work is finished or the result is ready

is a formal written abbreviation signalling proof completion

Surface Forms

QED main

Etymology

QED stands for the Latin phrase quod erat demonstrandum, which means 'which was to be demonstrated'. Mathematicians write QED at the end of a proof to show the argument is finished.