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From: WM <wolfgang.mueckenheim@tha.de>
Newsgroups: sci.math
Subject: Re: How many different unit fractions are lessorequal than all unit
 fractions?
Date: Wed, 11 Sep 2024 21:40:59 +0200
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On 11.09.2024 19:29, joes wrote:
> Am Wed, 11 Sep 2024 16:37:30 +0200 schrieb WM:
>> On 11.09.2024 04:09, Richard Damon wrote:
>>> On 9/10/24 2:59 PM, WM wrote:
>>
>>>> Real points can be addressed from every side.
>>> But only indexed from an actual end point.
>> Every real point is an end point (of its subinterval).
> What about open intervals?

Open intervals are intervals which have dark endpoints. Note that 
between any pair of visible real numbers there are many dark real numbers.

Regards, WM