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Step * 2 3 of Lemma rec-value-ext

.....wf..... 
1. x : atomic-values() ⋃ (rec-value() × rec-value()) ⋃ (rec-value() + rec-value())@i
2. v : co-value()
⊢ (co-value-height(v))↓ ∈ Type
BY
{ Auto }

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Latex:

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Latex:
.....wf..... 
1.  x  :  atomic-values()  \mcup{}  (rec-value()  \mtimes{}  rec-value())  \mcup{}  (rec-value()  +  rec-value())@i
2.  v  :  co-value()
\mvdash{}  (co-value-height(v))\mdownarrow{}  \mmember{}  Type


By

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Latex:
Auto

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