hello(Hi)

i want to know why the codomain of the function "cardinality" is ,i don't see why we need .

i'm confused,if is an empty set :

we have

am i correct ?

thanks for helping me(Happy)

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- Jun 16th 2009, 09:04 AMRaohThe function "Cardinality"
hello(Hi)

i want to know why the codomain of the function "cardinality" is ,i don't see why we need .

i'm confused,if is an empty set :

we have

am i correct ?

thanks for helping me(Happy) - Jun 16th 2009, 09:17 AMPlato
- Jun 16th 2009, 09:23 AMRaoh
thanks a lot,but i read it in a book(Thinking)

- Jun 16th 2009, 09:26 AMRaoh
and i meant by the codomain,the target domain.

thanks a lot