Re: The set of necessary FISONs

On 23.02.2025 16:37, joes wrote:

Am Sun, 23 Feb 2025 15:43:48 +0100 schrieb WM:

Right. UF = ℕ ==> Ø = ℕ.

No. As we've seen, you cannot omit all FISONs.

Which one cannot?

 

We omit all F(n) which amounts to remove F.

No, it amounts to the elements of F, not those of {F}.

All elements F(n) of F are F.

 

Like all natural numbers amount to ℕ (not {ℕ})

Like all FISONs amount to F, not {F}.

So it is.

 

Homework: Show the same for the set of FISONs.

{{}} ≠  {}

Wrong.

Neumann would like to have a word with you.

{{}} ≠  {} is not wrong, but it is not the demandede homework.
Regards, WM