Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Moebius Newsgroups: sci.math Subject: Re: How many different unit fractions are lessorequal than all unit fractions? Date: Sat, 28 Sep 2024 22:28:36 +0200 Organization: A noiseless patient Spider Lines: 27 Message-ID: References: <1aabd037-86bc-47bd-b402-f6b29c5c33e4@att.net> <298dcb6f-5f58-48b6-80e3-34260bf721f8@att.net> <283c426f-ab1c-4ef0-a06c-1bf7d28a2cfa@att.net> <6b50a171-8127-4ce6-9bd3-2dc213638e9b@att.net> <5e416e2d8ff7fcda1ba95f4c2f70d95b4698e838@i2pn2.org> <6ca882aa556e699cc346579ecaddc826fea1c28f@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, 28 Sep 2024 22:28:37 +0200 (CEST) Injection-Info: dont-email.me; posting-host="4b24f63c185914db3cb51fcdc53029ea"; logging-data="1469262"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/Lrc2K+Xj5qMrtpMA3tNsE" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Dz/6C1ZolcqbyfUwnhPRhF6PuHs= Content-Language: de-DE In-Reply-To: Bytes: 2952 Am 28.09.2024 um 22:20 schrieb Moebius: > Am 28.09.2024 um 06:26 schrieb Chris M. Thomasson: >> On 9/27/2024 3:13 PM, FromTheRafters wrote: >>> WM expressed precisely : >>>> On 25.09.2024 19:22, Richard Damon wrote: >>>>> On 9/25/24 11:14 AM, WM wrote: > >>>>>> NUF increases > > No, it "jumps at 0". > > MEANING: NUF(0) = 0 and Ax > 0: NUF(x) = aleph_0. > >>>>>> At no point it can increase by more than 1. >>>>> Why not? >>>> >>>> Because there is a finite gap between two [adjacent] unit fractions. > > Using WM's mantra: An e IN: 1/n - 1/(n + 1) > 0. @Mückenheim: Ax > 0: NUF(x) = aleph_0 besagt GENAU, dass für jedes x e IR mit x > 0 _abzählbar unendlich_ viele Stammbrüche in (0, x) enthalten sind. Und das ist auch richtig (denn es ist so). Der Umstand, dass trivialerweise An e IN: 1/n - 1/(n + 1) > 0 gilt, tut dem keinen Abbruch; auch wenn Du zu doof und zu blöde bist, um das zu verstehen.