Path: ...!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Moebius Newsgroups: sci.math Subject: Re: 2N=E Date: Sat, 26 Oct 2024 02:54:28 +0200 Organization: A noiseless patient Spider Lines: 28 Message-ID: References: <6c56b6df33cedd35cac468735501d2d89ad19048@i2pn2.org> <9e98e573c0368690d336299ab78121c3240aa8e7@i2pn2.org> <6310990a57ee5388e4e3a2c280fde00fc1b142ae@i2pn2.org> <3834533883e5a9dbc8546bf3eb425f762f2d0ab3@i2pn2.org> <6c929080fc639ef2e26217ccd2908b1face54361@i2pn2.org> <272433824a6757890727cb76203777dda01dcf1e@i2pn2.org> Reply-To: invalid@example.invalid MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 26 Oct 2024 02:54:29 +0200 (CEST) Injection-Info: dont-email.me; posting-host="706a04b542dc316883ba7ed9c15abdee"; logging-data="3586074"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18Zzje+pHJzpTQiAzlXay4/" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:0aZqo2yk2k7V1QC7SIYbu1PmGMY= Content-Language: de-DE In-Reply-To: Bytes: 2909 Am 24.10.2024 um 16:37 schrieb Moebius: > Am 24.10.2024 um 16:32 schrieb Moebius: >> Am 24.10.2024 um 15:59 schrieb joes: >>> Am Thu, 24 Oct 2024 15:49:48 +0200 schrieb WM: >> >>>> The [fact] of always even greater ones in [the set of] natural >>>> numbers proves >>>> potential infinity. >> >> Nonsense. It proves _actual_ infinity. > > Hint: For any nonempty set of natural numbers M: > >          M is infinite iff for each and every element m in M there's an > element m' in M such that m' > m. > > (Note that sets don't change.) The following approach concerning "|-symbols" might be considered a "representation" of "potential infinity": Rule 1: We may construct the |-symbol |. Rule 2: Given any |-symbol we may construct an |-symbol consisting of the given |-symbol followed by |. Rule 3: All |-symbols have to be constructed by applying rule 1 and rule 2 (finitely many times).