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From: joes <noreply@example.org>
Newsgroups: sci.math
Subject: Re: Incompleteness of Cantor's enumeration of the rational numbers
 (extra-ordinary)
Date: Sat, 14 Dec 2024 11:13:02 -0000 (UTC)
Organization: i2pn2 (i2pn.org)
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Am Thu, 12 Dec 2024 22:57:18 +0100 schrieb WM:
> On 12.12.2024 14:59, joes wrote:
> 
>> What Richard meant: do not confuse the set being mapped with the one
>> being mapped onto.
> I don't. D = {10n | n ∈ ℕ} is the set being mapped. The set D being
> mapped does not change when it is attached to the set ℕ being mapped in
> form of black hats.
You change the domain from D to N.

-- 
Am Sat, 20 Jul 2024 12:35:31 +0000 schrieb WM in sci.math:
It is not guaranteed that n+1 exists for every n.