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: Thu, 5 Dec 2024 22:31:01 +0100 Organization: A noiseless patient Spider Lines: 42 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: Thu, 05 Dec 2024 22:31:01 +0100 (CET) Injection-Info: dont-email.me; posting-host="e460a63d8fc463190e759e7a758b0cfb"; logging-data="1949020"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1968Fs8Dtt3A8tSF89FJLgPpX8ZYoBCODM=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:CTvuQZ1HPpiEruGTA+dc0YCYfKw= In-Reply-To: <9627c2aea5e3ebabd917ab0b9d1c7b241821d893@i2pn2.org> Content-Language: en-US Bytes: 3701 On 05.12.2024 21:11, joes wrote: > Am Thu, 05 Dec 2024 20:30:22 +0100 schrieb WM: >> On 05.12.2024 18:12, Jim Burns wrote: >>> On 12/5/2024 4:00 AM, WM wrote: >>>> On 04.12.2024 21:36, Jim Burns wrote: >>>>> On 12/4/2024 12:29 PM, WM wrote: >>> >>>>> No intersection of more.than.finitely.many end.segments of the >>>>> finite.cardinals holds a finite.cardinal,  or is non.empty. >>>> Small wonder. >>>> More than finitely many endsegments require infinitely many indices, >>>> i.e., all indices. No natnumbers are remaining in the contents. >>> ⎛ That's the intersection. >> And it is the empty endsegment. > There is no empty segment. If all natnumbers have been lost, then nothing remains. If there are infinitely many endsegments, then all contents has become indices. > >> The contents cannot disappear "in the >> limit". It has to be lost one by one if ∀k ∈ ℕ : E(k+1) = E(k) \ {k} is >> really true for all natnumbers. > Same thing. Every finite number is "lost" in some segment. And in all succeeding endsegments. > All segments are infinite. Try to find a way to think straight. Two identical sequences have the same limit. E(1)∩E(2)∩...∩E(n) = E(n). As long as all endsegments are infinite so is their intersection. > >>>> More than finitely many endsegments require infinitely many indices, >>>> i.e., all indices. No natnumbers are remaining in the contents. > I really don't understand this connection. First, this also makes > every segment infinite. The set of all indices is the infinite N. Yes. It is E(1) having all natnumbers as its content. Regards, WM