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On 28.12.2024 18:48, joes wrote:Except that for infinite sets, if they have a finite "ratio" they are the same size.Am Sat, 28 Dec 2024 17:50:49 +0100 schrieb WM:A relative size is very useful in order to correct the fantasy claim that the union of all FISONs covers the infinite gap between all FISONs and ω.A good example is the set of FISONs. Every FISON contains only aA relative size is useless because it is still exactly as infinite,
negligible quantity of natural numbers. A generous estimation is: Every
FISON contains less than 1 % of all natural numbers. There is no FISON
that contains more than 1 %. Therefore the union of all FISONs contains
less than 1 % of all natural numbers. Outside of the union of FISONs are
almost all natural numbers.
i.e. countable.
Regards, WM
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