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Step * of Lemma proof-tree_wf

∀[Sequent,Rule:Type]. ∀[effect:(Sequent × Rule) ⟶ (Sequent List?)].  (proof-tree(Sequent;Rule;effect) ∈ Type)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[Sequent,Rule:Type].  \mforall{}[effect:(Sequent  \mtimes{}  Rule)  {}\mrightarrow{}  (Sequent  List?)].
    (proof-tree(Sequent;Rule;effect)  \mmember{}  Type)


By

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Latex:
ProveWfLemma

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