Sujet : Re: Replacement of Cardinality
De : wolfgang.mueckenheim (at) *nospam* tha.de (WM)
Groupes : sci.mathDate : 04. Aug 2024, 16:44:45
Autres entêtes
Organisation : Nemoweb
Message-ID : <gLCi-GDsUAMOhKbDU9ubzvZPuAc@jntp>
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Le 03/08/2024 à 19:42, joes a écrit :
Am Sat, 03 Aug 2024 14:25:03 +0000 schrieb WM:
Here is the correct definition:
There exist NUF(x) unit fractions u, such that for all y >= x: u < y.
Note that the order is ∃ u ∀ y.
You are specifying an exact number, not only at least one.
Yes.
NUF(x) = ℵ₀ for all x > 0 is wrong. NUF(x) = 1 for all x > 0 already is
wrong since there is no unit fraction smaller than all unit fractions.
New sig.
Any problems with this definition? The reversed quantification is nonsense because ℵ₀ unit fractions need ℵ₀*2^ℵ₀ points above zero.
Regards, WM