Re: The set of necessary FISONs

On 01.02.2025 19:42, joes wrote:

Am Sat, 01 Feb 2025 14:40:12 +0100 schrieb WM:

On 01.02.2025 14:16, joes wrote:

Am Sat, 01 Feb 2025 13:24:31 +0100 schrieb WM:

When n can be deleted, then n+1 can be deleted. Nothing remains.

It works this way: If n can be removed, n AND n+1 can be removed.
But it doesn’t work this way: „If n can be left out, all n can be.”

Which one cannot be removed?

Wrong question. You cannot remove infinitely many. „Infinitely many”
is not a natural number.

Mathematical induction is a method for proving that a statement
P(n) is true for every natural number n that is, that the infinitely many cases P(0),P(1),P(2),P(3),... all hold. [Wikipedia]
Regards, WM