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Step * of Lemma sys-subformulas_wf

∀[S:Top]. (sys-subformulas(S) ∈ Type)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[S:Top].  (sys-subformulas(S)  \mmember{}  Type)


By

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Latex:
ProveWfLemma

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