Step of Proof: p-co-filter_wf 11,40

Inference at * 
Iof proof for Lemma p-co-filter wf:


  T:Type, P:(T), f:(x:T. Dec(P(x))). p-co-filter(f T(T + Top) 
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 by ((Unfolds ``all decidable p-co-filter`` 0) 
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Co.


DefinitionsDec(P), p-co-filter(f), x.A(x), case b of inl(x) => s(x) | inr(y) => t(y), P  Q, left + right, , Type, A, f(a), inr x , x(s), x:AB(x), x:AB(x), inl x , Top, x:A.B(x), t  T, Void
Lemmasnot wf, top wf

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