Proposition: {ghost} = ∅
The proof is left as an exorcise.
See more maths puns at The Aperiodical’s Best Maths Pun of 2014 Competition
A maths joke…
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Mathistopheles
Thomas Oléron Evans: Writing, Maths, Puzzles
Proposition: {ghost} = ∅
The proof is left as an exorcise.
See more maths puns at The Aperiodical’s Best Maths Pun of 2014 Competition