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From: joes <noreply@example.org>
Newsgroups: sci.math
Subject: Re: The set of necessary FISONs
Date: Sat, 15 Feb 2025 17:54:05 -0000 (UTC)
Organization: i2pn2 (i2pn.org)
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Am Sat, 15 Feb 2025 12:50:40 +0100 schrieb WM:
> On 14.02.2025 19:02, Richard Damon wrote:
>> On 2/14/25 11:28 AM, WM wrote:
> 
>>> The definition is that it is a set of FISONs which has a smallest
>>> element that is not as useless as a cup of coffee.
>> Which, as I said, is a definition in Naive Set theory,
> Obviously you have no clue of set theory, be it naive or advanced. Every
> set of ordinals has a smallest element. Look up the notion of
> well-order.
No, that is not the definition. No element of the set of FISONs is
necessary (though one could be, if we wouldn’t agree that none is)
for their union to be N. *That* set has a smallest element, as does
every other infinite set of FISONs (the nonempty finite sets do as
well, but their union is not N, but the largest FISON). Now you
come along and claim that the empty set should have a first element.

-- 
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.