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's the only difference between Donald Trump and Bozo the Clown?

Bozo The Clown has real hair on his head.
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How many graduate students does it take to screw in a light bulb?

Only one, but it may take upwards of five years for him to get it done.
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What's the difference between a tuba and a vacumn cleaner?

You have to turn one of them on before it sucks.

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How did the bubble gum cross the road?

On the bottom of the chicken's foot!
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What is a cow's favorite place?

The mooseum.
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Which day do fish hate?

Fryday
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What kind of mouse does not eat, drink, or even walk?

A computer mouse.
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Where are cars most likely to get flat tires?

At forks in the road.
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How many football players does it take to change a light bulb?

The entire team! And they all get a semester's credit for it!
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