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Step * of Lemma mapfilter-class_wf

∀[Info,A,B:Type]. ∀[P:A ⟶ 𝔹]. ∀[f:A ⟶ B]. ∀[X:EClass(A)].  ((f[v] where v from X such that P[v]) ∈ EClass(B))
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[Info,A,B:Type].  \mforall{}[P:A  {}\mrightarrow{}  \mBbbB{}].  \mforall{}[f:A  {}\mrightarrow{}  B].  \mforall{}[X:EClass(A)].
    ((f[v]  where  v  from  X  such  that  P[v])  \mmember{}  EClass(B))


By

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Latex:
ProveWfLemma

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