Definition from Wiktionary, the free dictionary
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See also: [U+25A0 BLACK SQUARE]
Character
Unicode name END OF PROOF
Code point U+220E
Unicode block Mathematical Operators
LaTeX input \blacksquare
[U+220D] [U+220F]

Translingual[edit]

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Etymology[edit]

Introduced into mathematical usage by Paul Halmos, modeled after the end sign (a printer’s ornament or dingbat used to indicate the end of an article or story) found in popular print media.

Symbol[edit]

  1. (mathematics) QED.

Usage notes[edit]

The symbol itself is called a tombstone or halmos in English.