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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Trump: "It's not a toupee,

I just found the Bush that Jeb lost."
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How many TV comedians does it take to screw in a light bulb?

Two, one to screw it in, and another to say "Sock it to Me." (Notes: Sock it = Socket. Also, for the infant readers among you, this was a popular catch-phrase from "Laugh In.")
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H2O is water and H2O2 is hydrogen peroxide. What is H2O4?

Drinking.
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What do you call a dog with a Rolex?

A watch dog.
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What did the Donald tell an illegal immigrant who was trying to put out a fire at Trump Tower?

No way Hose A.
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How did Noah see the animals in the Ark at night?

With flood lighting.
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How many punk rockers does it take to change a light bulb?

Twenty. One to hold the bulb, two to turn the ladder, and seventeen on the guest list.
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How is a dog like a telephone?

It has a collar I.D.
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Why did God invent lawyers?

So that real estate agents would have someone to look down on.
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