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Step * of Lemma map_wf_bag

∀[A,B:Type]. ∀[f:A ⟶ B]. ∀[bs:bag(A)].  (map(f;bs) ∈ bag(B))
BY
{ (Fold `bag-map` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[A,B:Type].  \mforall{}[f:A  {}\mrightarrow{}  B].  \mforall{}[bs:bag(A)].    (map(f;bs)  \mmember{}  bag(B))


By

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Latex:
(Fold  `bag-map`  0  THEN  Auto)

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