Related:

• In the old days of the cold war, when it was very hard for Westerners to visit the Soviet Union, a British mathematician travels to Moscow to speak in the seminar of a famous Russian professor.
  He starts his talk writing a theorem on the board....
• b>Theorem. A cat has nine tails. Proof. No cat has eight tails.
  Since one cat has one more tail than no cat, it must have nine tails....
• A mathematician has been invited to speak at a conference.
  His talk is announced as <p>Proof of the Riemann hypothesis....
• b>Theorem. Every positive integer is interesting.
  Proof. Assume towards a contradiction that there is an uninteresting positive integer....
• Some famous mathematician was to give a keynote speech at a conference.
  Asked for an advance summary, he said he would present a proof of Fermat's Last Theorem -- but they should keep it under their hats....
• Definitions of Terms Commonly Used in Higher Math The following is a guide to the weary student of mathematics who is often confronted with terms which are commonly used but rarely defined.
  In the search for proper definitions for these terms we found no authoritative, nor even recognized, source....
• The ark lands after The Flood. Noah lets all the animals out.
  Says, "Go and multiply." Several months pass. Noah decides to check up on the animals....
• Methods of Mathematical Proof This is from _A Random Walk in Science_ (by Joel E.
  Cohen?): To illustrate the various methods of proof we give an example of a logical system....