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Step * of Lemma funset_wf2

∀[A,B:Set{i:l}].  (A ⟶ B ∈ Set{i:l})
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[A,B:Set\{i:l\}].    (A  {}\mrightarrow{}  B  \mmember{}  Set\{i:l\})


By

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Latex:
ProveWfLemma

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