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Humor in der Mathematik

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  1. Differentiate it and put into the refrig. Then integrate it in the refrig.
  2. Redefine the measure on the referigerator (or the elephant).
  3. Apply the Banach-Tarsky theorem.

Number theory:

  1. First factorize, second multiply.
  2. Use induction. You can always squeeze a bit more in.


  1. Step 1: Show that the parts of it can be put into the refrig.
    Step 2: Show that the refrig. is closed under the addition.
  2. Take the appropriate universal refrigerator and get a surjection from refrigerator to elephant.


  1. Have it swallow the refrig. and turn inside out.
  2. Make a refrig. with the Klein bottle.
  3. The elephant is homeomorphic to a smaller elephant.
  6. For those who object to method 5 because it's cruel to animals. Put the elephant's BABY in the refrigerator.

Algebraic topology:


Linear algebra:

  1. Put just its basis and span it in the refrig.

Affine geometry:

There is an affine transformation putting the elephant into the refrigerator.

Set theory:

  1. It's very easy!
    refrigerator = { elephant }
  2. The elephant and the interior of the refrigerator both have cardinality c.


Declare the following:
Axiom 1. An elephant can be put into a refrigerator.

Complex analysis:


Numerical analysis:

  1. Put just its trunk and refer the rest to the error term.
  2. Work it out using the Pentium.


  1. Bright statistician. Put its tail as a sample and say "Done."
  2. Dull statistician. Repeat the experiment pushing the elephant to the refrig.
  3. Our NEW study shows that you CAN'T put the elephant in the refrigerator.


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