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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: WM <wolfgang.mueckenheim@tha.de> Newsgroups: sci.math Subject: Re: The reality of sets, on a scale of 1 to 10 [Was: The non-existence of "dark numbers"] Date: Sun, 13 Apr 2025 17:29:32 +0200 Organization: A noiseless patient Spider Lines: 16 Message-ID: <vtgl8r$368hi$1@dont-email.me> References: <vqrbtd$1chb7$2@solani.org> <vrpsaa$3708j$1@dont-email.me> <vrpud0$po9$2@news.muc.de> <vrsb4p$1gv1d$3@dont-email.me> <vrsgn5$1lg8$4@news.muc.de> <vrujtd$3l4hv$1@dont-email.me> <vrusi3$10kn$2@news.muc.de> <vrv3c4$3vgl8$1@dont-email.me> <vrves5$1507$1@news.muc.de> <vs1l08$2cnha$1@dont-email.me> <3449b34c60603bf59f694df42857003d0bda7ab5@i2pn2.org> <vs1o24$2c93u$2@dont-email.me> <vs1s4h$26e3$2@news.muc.de> <vs4blb$eulg$6@solani.org> <vs6g7b$2mp5$1@news.muc.de> <vsjiud$22the$1@dont-email.me> <vsmmem$v6u$1@news.muc.de> <vsmr1s$1fvvf$1@dont-email.me> <99a6fc8bceae7f4ebdb88740027d2347be94b783@i2pn2.org> <vtg7ho$2lfc2$1@dont-email.me> <vtg90v$2rurd$1@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sun, 13 Apr 2025 17:29:32 +0200 (CEST) Injection-Info: dont-email.me; posting-host="86daa7cab198219b40baca265dff3a1f"; logging-data="3351090"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18DGE3tYqDi/MUdulSB54JHd/GjvBVyWvU=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:+TtqIrFNbnnB/boEzXD1kPsXmO0= In-Reply-To: <vtg90v$2rurd$1@dont-email.me> Content-Language: en-US Bytes: 2193 On 13.04.2025 14:00, FromTheRafters wrote: > on 4/13/2025, WM supposed : >> Bijections with ℕ are ordered by the well-ordered set ℕ. > > The set N is not ordered, you want omega for the ordered set of naturals. The well-ordered set ℕ is well ordered. Compare § 12. Die wohlgeordneten Mengen ..... 312 § 13. Die Abschnitte wohlgeordneter Mengen .... 314 § 14. Die Ordnungszahlen wohlgeordneter Mengen .. 320 [Cantor, collected works] Regards, WM