MHB Does cardinality of a set refer to the number of elements it has?

yakin
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Is cardnality of a set refers to the number of elements that set has?
 
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yakin said:
Is cardnality of a set refers to the number of elements that set has?
It does not only refer to the number of elements; it is that number. :) For infinite sets, though, it is more complicated.
 

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Thread 'Detail of Diagonalization Lemma'

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