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Step * of Lemma or-class_wf

∀[Info,A,B:Type]. ∀[X:EClass(A)]. ∀[Y:EClass(B)].  (or-class(X;Y) ∈ EClass(A + B))
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[Info,A,B:Type].  \mforall{}[X:EClass(A)].  \mforall{}[Y:EClass(B)].    (or-class(X;Y)  \mmember{}  EClass(A  +  B))


By

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Latex:
ProveWfLemma

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