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Step * of Lemma orderedpair-fst_wf

∀[pr:coSet{i:l}]. (fst(pr) ∈ coSet{i:l})
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[pr:coSet\{i:l\}].  (fst(pr)  \mmember{}  coSet\{i:l\})


By

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Latex:
ProveWfLemma

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