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 : 02. Nov 2024, 18:40:09
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vg5o5q$3sb7d$5@dont-email.me>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
User-Agent : Mozilla Thunderbird
On 02.11.2024 14:03, Moebius wrote:
NUF(x) = 0 for x = 0 and
NUF(x) = aleph_0 for all x e IR, x > 0.
If NUF(x) has grown to ℵ₀ at x₀, then ℵ₀ unit fractions must be between 0 and x₀. Hence at least ℵ₀ points with ℵ₀ intervals of uncountably many points must be between 0 and x₀. That cannot happen at x₀ = 0.
Regards, WM