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From: FromTheRafters <FTR@nomail.afraid.org>
Newsgroups: sci.logic,sci.math
Subject: Re: Replacement of Cardinality
Date: Mon, 29 Jul 2024 11:52:18 -0400
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WM formulated the question :
> Le 29/07/2024 � 02:04, Moebius a �crit :
>> Am 27.07.2024 um 19:34 schrieb Jim Burns:
>>> sci.logic and sci.math
>>> 
>>> On 7/26/2024 12:31 PM, WM wrote:
>>> 
>>>> _The rule of subset_
>> 
>> Where did M�ckenheim get this "rule" from? Any source?
>
> Logic! If A contains all elements of B, but B does not contain all elements 
> of A, then A has more elements than B.

Have you reviewed 'Cardinal Arithmetic' lately? I know it has been 
pointed out to you several times. The aforementioned does not work for 
infinite sets. Addition like this simply doesn't affect the 'size' of 
the set if the set is infinite.