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From: FromTheRafters <FTR@nomail.afraid.org>
Newsgroups: sci.math
Subject: Re: Incompleteness of Cantor's enumeration of the rational numbers (extra-ordinary)
Date: Wed, 01 Jan 2025 09:47:11 -0500
Organization: Peripheral Visions
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WM wrote :
> On 31.12.2024 09:56, joes wrote:
>> Am Mon, 30 Dec 2024 22:53:38 +0100 schrieb WM:
>
> Correction:
>
> The collection of definable natural numbers (FISONs) is closed under 
> multiplication

How can that be? If you have defined your FISODNs as being what's left 
of the elements of N after 'almost all' have been excluded from 
consideration in the new set, then multiplication is only a partial 
function.