mathematicians

-- does it take to screw in a light bulb?

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

- 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.... - How many
mathematicians
-- does it take to screw in a light bulb?

One. He gives it to five Oregonians, thereby reducing the problem to an earlier joke.... - How many
psychologists
-- does it take to change a light bulb?

Just one, but the light bulb has to really WANT to change.... - How many
mathematicians
-- does it take to screw in a light bulb?

None. It's left to the reader as an exercise.... - How many
Zen masters
-- does it take to screw in a light bulb?

Two: one to change the bulb and one not to change it.... - How many
sorority girls
-- does it take to screw in a light bulb?

51. One to change the bulb, and fifty to sing about the bulb being changed.... - How many
feminists
-- does it take to screw in a light bulb?

11. 1 to change the light bulb and 10 to form a survivors of darkness support group!... - How many
real women
-- does it take to change a light bulb?

None: A real woman would have plenty of real men around to do it, and one of them can change the bulb while he's at it.... - How many
lawyers
-- does it take to change a light bulb?

You won't find a lawyer who can change a light bulb....