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 did the porcupine say to the cactus?

Is that you mommy?
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What do you call a country where everyone has to drive a red car?
A red carnation.
What do you call a country where everyone has to drive a pink car?
A pink car-nation.
What would the country be called if everyone in it lived in their cars?

An in-car-nation.
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Why did the chicken cross the clothing store?

To get to the other size!
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How many Wardrobe people does it take to screw in a light bulb?

"Nobody said I needed doubles on that!"
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What do you call a chicken in the 1960's?

A funky chicken.
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What do you call a movie about Donald Trump, Bernie Madoff, and Kenneth Lay?

The League of Extraordinary Con Men.
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How can a pregnant woman tell that she's carrying a future lawyer?

She has an uncontrollable craving for bologna.
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What do chemists call a benzene ring with iron atoms replacing the carbon atoms?

A ferrous wheel.
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What's gray, eats fish, and lives in Washington, D.C.?

The Presidential Seal.
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