Step
*
of Lemma
awf-subtype
∀[T:Type]. ∀[s:awf(T)].  (s ∈ T + (awf(T) List))
BY
{ (Auto THEN All (Unfold `awf`) THEN InstLemma `corec-ext` [⌜λ2S.T + (S List)⌝]⋅ THEN Auto) }
Latex:
Latex:
\mforall{}[T:Type].  \mforall{}[s:awf(T)].    (s  \mmember{}  T  +  (awf(T)  List))
By
Latex:
(Auto  THEN  All  (Unfold  `awf`)  THEN  InstLemma  `corec-ext`  [\mkleeneopen{}\mlambda{}\msubtwo{}S.T  +  (S  List)\mkleeneclose{}]\mcdot{}  THEN  Auto)
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