(3steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc
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The ordered pairs of natural numbers can be placed in one-to-one correspondence with the natural numbers. (Cantor)

At: card nat vs nat nat


  () ~ 

By: BackThru: Thm*  (f:(AB). Bij(ABf))  (B ~ A)


Generated subgoal:

1   f:(). Bij(f)
2 steps

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(3steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc