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Step * of Lemma word-equiv_wf

∀[X:Type]. ∀[w1,w2:(X + X) List].  (word-equiv(X;w1;w2) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[X:Type].  \mforall{}[w1,w2:(X  +  X)  List].    (word-equiv(X;w1;w2)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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