Editing Mathematical proof (section)

==Ending a proof==
{{Main|Q.E.D.}}
Sometimes, the abbreviation ''"Q.E.D."'' is written to indicate the end of a proof. This abbreviation stands for ''"quod erat demonstrandum"'', which is [[Latin]] for ''"that which was to be demonstrated"''. A more common alternative is to use a square or a rectangle, such as □ or ∎, known as a "[[tombstone (typography)|tombstone]]" or "halmos" after its [[eponym]] [[Paul Halmos]]. Often, "which was to be shown" is verbally stated when writing "QED", "□", or "∎" during an oral presentation. Unicode explicitly provides the "end of proof" character, U+220E (∎) <small>(220E(hex) = 8718(dec))</small>.