How many mathematicians does it take to screw in a light bulb?

One. He gives it to six Californians, thereby reducing the problem to an earlier joke...

In earlier work, Wiener [1] has shown that one mathematician can change a light bulb.

If k mathematicians can change a light bulb, and if one more simply watches them do it, then k+1 mathematicians will have changed the light bulb.

Therefore, by induction, for all n in the positive integers, n mathematicians can change a light bulb.

Bibliography:

[1] Wiener, Matthew P., <11485@ucbvax>, Re: YALBJ, 1986
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What is at the end of everything?

The letter G.
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Where do fish keep their money?

In a river bank
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How do you prevent a Summer cold?

Catch it in the Winter!
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What is "HIJKLMNO"?

H2O.
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How do you cut a wave in half?

Use a sea saw.
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What did the little girl say when she had to choose between a tricycle and a candy bar?

"Trike or Treat"?
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What has a lot of keys but can not open any doors?

A piano.
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If minorities have the race card and women have the gender card, what do rednecks have?

The Trump Card
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How many Microsoft executives does it take to change a light bulb?

None. Bill Gates will just redefine Darkness® as the industry standard.
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