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From: Moebius <invalid@example.invalid>
Newsgroups: sci.math
Subject: Re: The reality of sets, on a scale of 1 to 10 [Was: The
 non-existence of "dark numbers"]
Date: Mon, 24 Mar 2025 22:44:21 +0100
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Am 24.03.2025 um 22:06 schrieb Alan Mackenzie:

> The Wikipedia article describes [that natural density] it as a branch of
> number theory, not set theory.

Sure. But what do you expect from Mückenheim?

On the other hand... (lol)

"Die gesamte Mathematik inklusive der klassischen Zahlenbereiche läßt 
sich als Teilgebiet der Mengenlehre auffassen." ["All of mathematics, 
including classical number domains, can be regarded as a sub-field of 
set theory."] (A. Oberschelp, Aufbau des Zahhlensystems, 1968)

Lit.: https://en.wikipedia.org/wiki/Arnold_Oberschelp

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