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Step * of Lemma singleitem_wf2

∀[s:Set{i:l}]. (singleitem(s) ∈ Set{i:l})
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[s:Set\{i:l\}].  (singleitem(s)  \mmember{}  Set\{i:l\})


By

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Latex:
ProveWfLemma

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