- #1
cxc001
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Prove cardinality of every finite nonempty set A is less then cardinality of natural number N
|A|<|N|
set A is nonempty finite set
natural number N is denumerable (infinite countable set)
|A|<|N| if there exist a injective (one-to-one) function f: A->N, but NO bijective function, which means NO surjective (onto) function
How to prove it in detail?
Help please!
|A|<|N|
set A is nonempty finite set
natural number N is denumerable (infinite countable set)
|A|<|N| if there exist a injective (one-to-one) function f: A->N, but NO bijective function, which means NO surjective (onto) function
How to prove it in detail?
Help please!