Sujet : Re: Simple enough for every reader?
De : mikko.levanto (at) *nospam* iki.fi (Mikko)
Groupes : sci.logicDate : 18. May 2025, 11:30:13
Autres entêtes
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Message-ID : <100ccrl$upk6$1@dont-email.me>
References : 1
User-Agent : Unison/2.2
On 2025-05-17 15:00:33 +0000, WM said:
Are you aware of the fact that in
{1}
{1, 2}
{1, 2, 3}
...
{1, 2, 3, ..., n}
...
up to every n infinitely many natural numbers of the whole set
{1, 2, 3, ...}
are missing? Infinitely many of them will never be mentioned individually. They are dark.
For example, if we pick 5 for n we have
{1}
{1, 2}
{1, 2, 3}
{1, 2, 3, 4}
{1, 2, 3, 4, 5}
then 6 and infinitely many other numbers are missing. So numbers
6, and 7 are dark as are ingfinitely many other numbers.
-- Mikko