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Step * of Lemma RankEx2_Union_wf

∀[S,T:Type]. ∀[union:S × RankEx2(S;T) + RankEx2(S;T)].  (RankEx2_Union(union) ∈ RankEx2(S;T))
BY
{ DepprodCoDatatypeConstructorWf `RankEx2_size` }

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Latex:

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Latex:
\mforall{}[S,T:Type].  \mforall{}[union:S  \mtimes{}  RankEx2(S;T)  +  RankEx2(S;T)].    (RankEx2\_Union(union)  \mmember{}  RankEx2(S;T))


By

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Latex:
DepprodCoDatatypeConstructorWf  `RankEx2\_size`

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