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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Why don't aliens eat clowns?

Because they taste funny!
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What's a dog's favorite food for breakfast?

Pooched eggs.
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I just deleted all the German names off my phone.

It's Hans free.
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What's the name of the archeologist that works at Scotland Yard?

Sherlock Bones.
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What do you call a wheel made of iron?

A ferrous wheel.
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What message did Bach have on his answering machine?

"This phone is baroque, please call Bach later."

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What cheese do you use to coax a bear out of the woods with?

Camembert.
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When did the fly fly?

When the spider spied her!
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What is a horse's favorite sport?

Stable tennis
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