Path: ...!weretis.net!feeder9.news.weretis.net!news.quux.org!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: WM Newsgroups: sci.math Subject: Re: Incompleteness of Cantor's enumeration of the rational numbers (extra-ordinary) Date: Sat, 14 Dec 2024 12:21:28 +0100 Organization: A noiseless patient Spider Lines: 23 Message-ID: References: <9bcc128b-dea8-4397-9963-45c93d1c14c7@att.net> <50c82b03-8aa1-492c-9af3-4cf2673d6516@att.net> <5a122d22-2b21-4d65-9f5b-4f226eebf9d4@att.net> <3af23566-0dfc-4001-b19b-96e5d4110fee@tha.de> <9627c2aea5e3ebabd917ab0b9d1c7b241821d893@i2pn2.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 14 Dec 2024 12:21:28 +0100 (CET) Injection-Info: dont-email.me; posting-host="b67ed49269f1575d0aac6d4d8c698b63"; logging-data="4149653"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18v0VkX4oyiOrLrX1RSgNr5JAhlJe3DW9A=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:lb0Aohm3vu3olqdBi4NbK3YpLLo= In-Reply-To: Content-Language: en-US Bytes: 2910 On 14.12.2024 12:00, joes wrote: > Am Sun, 08 Dec 2024 11:55:34 +0100 schrieb WM: >> On 08.12.2024 11:43, joes wrote: >>> Am Sat, 07 Dec 2024 22:50:27 +0100 schrieb WM: >> >>>> ∀n ∈ ℕ: E(1)∩E(2)∩...∩E(n) = E(n) >>>> All n are infinitely many. >>> That sentence only talks about a single n at a time, though, >>> not about the infinite intersection. >> It talks about all n and therefore about all E(n). > No, it says nothing about the intersection of all E(n), > only about finite intersections All E(n) have finite indices n. But the quantifier-nonsense is no longer under discussion because the intersections are sufficient and accepted as becoming empty. And their procedure is the same as that of the endsegments: ∀k ∈ ℕ : ∩{E(1), E(2), ..., E(k+1)} = ∩{E(1), E(2), ..., E(k)} \ {k}). Regards, WM