Step of Proof: biject_wf 12,41

Inference at * 
Iof proof for Lemma biject wf:


  AB:Type, f:(AB). Bij(A;B;f  
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 by ((Unfold `biject` 0) 
CollapseTHEN ((Auto_aux (first_nat 1:n) ((first_nat 1:n),(first_nat 3:n
C)) (first_tok :t) inil_term))) 
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C.


DefinitionsP & Q, Bij(A;B;f), , t  T, x:AB(x)
Lemmassurject wf, inject wf

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