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Step * of Lemma image-ap_wf

∀[X,Y:Type]. ∀[d:metric(Y)]. ∀[f:X ⟶ Y]. ∀[x:X].  (f[x] ∈ f[X])
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[X,Y:Type].  \mforall{}[d:metric(Y)].  \mforall{}[f:X  {}\mrightarrow{}  Y].  \mforall{}[x:X].    (f[x]  \mmember{}  f[X])


By

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Latex:
ProveWfLemma

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