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From: WM <wolfgang.mueckenheim@tha.de>
Newsgroups: sci.math
Subject: Re: The set of necessary FISONs
Date: Tue, 25 Feb 2025 10:02:47 +0100
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On 24.02.2025 19:01, joes wrote:
> Am Mon, 24 Feb 2025 15:59:18 +0100 schrieb WM:

>> These axioms can be applied to show that all FISONs can be removed.
> Nope. Any number of them can be removed. Indeed, removing all
> changes the union, as you have admitted.

There are not more than any number.
>> Only all FISONs = natural numbers are the matter of my proof. According
>> to Zermelo they make up the set ℕ.
> The set N is not a natural number

Of course. Nobody said so.

> that the proof concerns.

But Zermelo claims to produce the set ℕ. Is he wrong?
Hint: In fact he produces ℕ_def.

Regards, WM