Related Clues:

• Proof finale
• Math finale
• End of a demonstration?
• Logician's abbr.
• Conclusion, in a proof
• Proof letters
• Proof ender
• End-of-proof letters
• Theorem prover's sign-off
• Math abbr.
• Equivalent of 'the end'
• Proof's end
• Mathematician's sign-off
• As shown, for short
• Math proof abbr.