Re: The set of necessary FISONs

On 23.01.2025 13:01, Richard Damon wrote:

But There is no single UF(n) that equals N, because you can ony get there from the union of an infinite set of FISONs.

The union of all FISONs does not cover ℕ. Otherwise Cantor's theorem would require the existence of a first necessary FISON. That is mathematics.

 Your question about the "first" necessary fission is an invalid question, as it is the same as asking for the highest Natural Number, which doesn't exist,

No, it is not. But there are only invalid handwaving answers.
Regards, WM