Definition, Meaning & Synonyms
qed
abbreviation
/kjuː iː diː/
Definition
An abbreviation used at the end of a mathematical proof or philosophical argument to signify that what was needed to be demonstrated has been proved.
Examples
- After proving the theorem, the mathematician wrote ‘QED’ at the bottom of the page.
- In his argument, he presented a logical progression that concluded with the phrase ‘QED’.
Meaning
The term QED comes from the Latin phrase ‘quod erat demonstrandum’, which means ‘which was to be demonstrated’. It indicates the completion of a proof or an argument.
Synonyms
- therefore
- thus
- as a result
