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NNTP-Posting-Date: Mon, 07 Oct 2024 23:44:21 +0000
Subject: Re: How many different unit fractions are lessorequal than all unit
 fractions? (infinitary)
Newsgroups: sci.math
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From: Ross Finlayson <ross.a.finlayson@gmail.com>
Date: Mon, 7 Oct 2024 16:44:32 -0700
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On 10/07/2024 09:11 AM, Alan Mackenzie wrote:
> FromTheRafters <FTR@nomail.afraid.org> wrote:
>> Alan Mackenzie wrote :
>
> [ .... ]
>
>>> The idea of one countable set being "bigger" than another countable set is
>>> simply nonsense.
>
>> Oops. Finite sets are countable too. :)
>
> Yes indeed!  Thanks for pointing out my mistake.  What I should have
> written (WM please take note) is:
>
> The idea of one countably infinite set being "bigger" than another
> countably infinite set is simply nonsense.
>

Oh, no, there are plenty of "size" relations given other
aspects that merely cardinality that have anything else
to do with what a set models.

For example, there's OUTPACING which makes for that
a proper superset of a set, is larger, by the OUTPACING
relation, it's a fact of mathematics.

And exactly half of the integers are even.
It's called density and it's a property of
them including sets of them.


You're about as bad.