Logical letters

• Calculus class letters
• Geometric postscript
• Abbr. that a proof reader might come across?
• Geometry letters
• Geometric sign-off
• Math proof ending
• Peter Parnell play about physicist Richard Feynman
• A relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons
• Mathematician's sign-off

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 ...