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Step * of Lemma infix_ap_wf

∀[A,B,C:Type]. ∀[f:A ⟶ B ⟶ C]. ∀[x:A]. ∀[y:B].  (x f y ∈ C)
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Latex:

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Latex:
\mforall{}[A,B,C:Type].  \mforall{}[f:A  {}\mrightarrow{}  B  {}\mrightarrow{}  C].  \mforall{}[x:A].  \mforall{}[y:B].    (x  f  y  \mmember{}  C)


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Latex:
Auto

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