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1-1 Correspondence

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In mathematics, "same number" is interpreted as that one to one correspondence holds. And the word "equipotent" is used to express this equivalence.

Let's see that the daily expression of "same number" is equivalent to the mathematical expression of "equipotent" .

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If numbers are same, 1-1 correspondence holds.		If 1-1 correspondence holds, numbers are same.
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