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At: bij iff is 1 1 corr 1 1

1. A : Type
2. B : Type
3. f : AB
4. Bij(ABf)
  g:(BA). InvFuns(A;B;f;g)


By: BackThru: Thm*  f:(AB). Bij(ABf (g:(BA). InvFuns(A;B;f;g))


Generated subgoals:

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functionuniverseimpliesallexists
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(5steps total) PrintForm Definitions Lemmas DiscreteMath Sections DiscrMathExt Doc