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QED

An abbreviated Latin phrase used to indicate the end of a proof, especially if it may not be immediately obvious that the proof is complete.

QED stands for the Latin phrase quod erat demonstrandum, which means "That which was to be proven."

 


  this page updated 21-feb-16
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes