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Bijections have inverses.

At: bij imp exists inv version2


  A,B:Type, f:(AB). Bij(ABf (g:(BA). InvFuns(A;B;f;g))

By: SideProof


Generated subgoal:

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

8 steps

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functionuniverseimpliesandallexists
marked_clause_thenmarkup_tagpfdisp_conclred_hyp
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(12steps total) PrintForm Definitions DiscreteMath Sections DiscrMathExt Doc