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Step * of Lemma orderedpair-fst_wf2

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

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Latex:

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


By

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Latex:
ProveWfLemma

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