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Step * of Lemma fset-constrained-image_wf

∀[T,A:Type]. ∀[domeq:EqDecider(T)]. ∀[rngeq:EqDecider(A)]. ∀[f:T ⟶ A]. ∀[P:A ⟶ 𝔹]. ∀[s:fset(T)].
  (f"(s) s.t. P ∈ fset(A))
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T,A:Type].  \mforall{}[domeq:EqDecider(T)].  \mforall{}[rngeq:EqDecider(A)].  \mforall{}[f:T  {}\mrightarrow{}  A].  \mforall{}[P:A  {}\mrightarrow{}  \mBbbB{}].  \mforall{}[s:fset(T)].
    (f"(s)  s.t.  P  \mmember{}  fset(A))


By

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Latex:
ProveWfLemma

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