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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? (infinitary)
Date: Tue, 22 Oct 2024 10:13:07 +0200
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On 21.10.2024 22:34, Jim Burns wrote:
> On 10/21/2024 2:25 PM, WM wrote:
>> On 21.10.2024 14:30, Jim Burns wrote:
>>> On 10/21/2024 6:01 AM, WM wrote:
> 
>>> How can you (WM) not.know what 'preimage' means?
>>
>> I have lectured analysis in German only.
>> I assumed that preimage is the set mapped to the image.
> 
> It's not an improvement that you allegedly think that
> odd numbers are the result of doubling.

I never did. Are your comprehension problems new?

>>>> The range.

A complete set of natural numbers.

>>>> It is a complete set by assumption.
>>>> All its numbers can be mapped,
>>>> some of them not to the preimage.

Not to the mapped set.

Regards, WM