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Step * of Lemma Des_wf

∀[A:Type]. ∀[<:A ⟶ A ⟶ ℙ].  (Des(A;a,b.<[a;b]) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[A:Type].  \mforall{}[<:A  {}\mrightarrow{}  A  {}\mrightarrow{}  \mBbbP{}].    (Des(A;a,b.<[a;b])  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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