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From: WM <wolfgang.mueckenheim@tha.de>
Newsgroups: sci.math
Subject: Re: Incompleteness of Cantor's enumeration of the rational numbers
Date: Sun, 17 Nov 2024 11:40:54 +0100
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On 16.11.2024 22:33, Moebius wrote:

> For example "aleph_0 - aleph_0" is not defined.

Small wonder. ℵo means only infinitely many: |ℕ|, |ℚ|, and many others. 
|ℕ|-|ℕ| however is defined.

Regards, WM