[FOM] cardinality beyond regularity and Choice

Zuhair Abdul Ghafoor Al-Johar zaljohar at yahoo.com
Tue Dec 15 05:51:12 EST 2009

>Irving H. Anellis wrote:

>it was of course Georg Cantor who first introduced cardinal 
numbers and defined the concept of cardinality (as the "Machtigkeit" of 
a set)


I agree that Georg Cantor was the first
who introduced Cardinality
but he didn't define it! he only characterized it.
Cantor's approach to Cardinality was more akin
to the primitive approach of Cardinality that I
mentioned in this post.

It was Frege who presented a "DEFINED" concept
of Cardinality, a definition that
Russell revived later.



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