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Topic: How many real numbers are there?
Replies: 18   Last Post: Jul 9, 2006 3:00 PM

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Posts: 188
Registered: 12/13/04
Re: How many real numbers are there?
Posted: Jul 7, 2006 5:26 PM
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Toni Lassila wrote:
> On 7 Jul 2006 13:30:05 -0700, "Nathan" <> wrote:

> >Mike Deeth wrote:
> >

> >> It's well-known that a countable union of finite sets is countable.
> >
> >Nope! You said you were working in ZF. This requires AC.

> No it doesn't.

Okay, not the *full* AC, but ZF is not enough.

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