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Step * of Lemma concat-lifting-1_wf

∀[B,A:Type]. ∀[f:A ⟶ bag(B)].  (f@ ∈ bag(A) ⟶ bag(B))
BY
{ ProveWfLemma }

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Latex:

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


By

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Latex:
ProveWfLemma

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