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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: sci.math
Subject: Re: How many different unit fractions are lessorequal than all unit
 fractions?
Date: Thu, 12 Sep 2024 11:33:02 -0700
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On 9/12/2024 4:15 AM, WM wrote:
> Le 11/09/2024 à 23:13, FromTheRafters a écrit :
>> Chris M. Thomasson laid this down on his screen :
>>> On 9/11/2024 12:40 PM, WM wrote:
> 
>>>> Open intervals are intervals which have dark endpoints.
>>>
>>> What about the gray ones?
>>>
> Grey points are dark points which can become visible. But the endpoints 
> of open intervals will remain dark forever.

Ummm.... Have you heard of the really dark points?