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Step * of Lemma set-function_wf

∀[s:coSet{i:l}]. ∀[f:{x:coSet{i:l}| (x ∈ s)}  ⟶ coSet{i:l}].  (set-function{i:l}(s; x.f[x]) ∈ ℙ')
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[s:coSet\{i:l\}].  \mforall{}[f:\{x:coSet\{i:l\}|  (x  \mmember{}  s)\}    {}\mrightarrow{}  coSet\{i:l\}].    (set-function\{i:l\}(s;  x.f[x])  \mmember{}  \mBbbP{}')


By

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Latex:
ProveWfLemma

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