Sujet : Re: How many different unit fractions are lessorequal than all unit fractions? (infinitary)
De : wolfgang.mueckenheim (at) *nospam* tha.de (WM)
Groupes : sci.mathDate : 22. Oct 2024, 17:12:44
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vf8itt$1hosd$2@dont-email.me>
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On 22.10.2024 18:03, Jim Burns wrote:
On 10/22/2024 4:13 AM, WM wrote:
ℕ is defined such that
n ∈ ℕ ⇔ ∃{0,1,...,n-1,n}
Most of all it is an invariable set with all its elements existing and subject to doubling.
∀n ∈ ℕ: 2×n ∈ ℕ
Not if all elements are existing before multiplication already.
Regards, WM