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From: WM <wolfgang.mueckenheim@tha.de>
Newsgroups: sci.math
Subject: Re: Incompleteness of Cantor's enumeration of the rational numbers
 (extra-ordinary)
Date: Sun, 29 Dec 2024 12:09:06 +0100
Organization: A noiseless patient Spider
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On 28.12.2024 20:42, Moebius wrote:

>> Hint: For each and every n e IN there is a singleton such that n is in 
>> it (namely {n}).
>>
>> BUT there's no singleton such that each and every n e IN is in it.

My theorem: Every union of FISONs which stay below a certain threshold 
stays below that threshold.

Find a counterexample. Don't claim it but prove it. Fail.

Regards, WM