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Step * of Lemma imageset_wf2

∀[B,f:Set{i:l}].  (imageset(B;f) ∈ Set{i:l})
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[B,f:Set\{i:l\}].    (imageset(B;f)  \mmember{}  Set\{i:l\})


By

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Latex:
ProveWfLemma

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