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Step * of Lemma es-interface-or-left_wf

∀[Info,A,B:Type]. ∀[X:EClass(one_or_both(A;B))].  (es-interface-or-left(X) ∈ EClass(A))
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[Info,A,B:Type].  \mforall{}[X:EClass(one\_or\_both(A;B))].    (es-interface-or-left(X)  \mmember{}  EClass(A))


By

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Latex:
ProveWfLemma

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