What Does ##n(A)## Represent in Set Theory?

adjacent · Jun 29, 2014

Homework Statement

attachment.php?attachmentid=70965&stc=1&d=1404035528.png

##n(A)##
I have some doubts.
Obviously, ##n(A)## means the number of elements in set A.
Should it be 3 or 6?

Should I consider each number to be a different element?

micromass · Jun 29, 2014

The names of the elements are irrelevant. If you change the names ##\{1,2,3\}## by ##\{a,b,c\}##, then it will have the same number of elements. Does that answer your question?

adjacent · Jun 29, 2014

micromass said:

The names of the elements are irrelevant. If you change the names ##\{1,2,3\}## by ##\{a,b,c\}##, then it will have the same number of elements. Does that answer your question?

Yes, thank you

What Does ##n(A)## Represent in Set Theory?

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What Does ##n(A)## Represent in Set Theory?

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