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 did the chemist sole and heel his shoes with silicone rubber?

To reduce his carbon footprint.
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What did the clock do after it ate?

It went back four seconds!
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What kind of phones do people in jail use?

Cell phones
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What do have when a lawyer is buried up to his neck in sand?

Not enough sand.
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Where is a rabbit's favorite place to eat?

Ihop
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Why do fish live in salt water?

Because pepper makes them sneeze
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What do you call lending money to a bison?

A buff-a-loan
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Where do fish keep their money?

In a river bank
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I just deleted all the German names off my phone.

It's Hans free.
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