Logician's signoff

• Math notation
• Equivalent of "the end"
• Letters after a proof
• Math prof's "There you have it"
• Relative of "voilà!"
• Math text abbr
• Familiar inits. in math
• Letters of proof

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
QED \QED.\ (k[=u]"[=e]*d[=e]"), n. Quantum electrodynamics. [abbrev.]

Wikipedia Word definitions in Wikipedia
QED is a play by American playwright Peter Parnell which chronicles (part of) a day in the life of Nobel Prize-winning physicist Richard Feynman . It presents scenes from a day in Feynman's life, less than two years before his death, interweaving many strands ...