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Step * 1 of Lemma member-per-or-right

.....wf..... 
1. A : Type
2. B : Type
3. b : B
⊢ 0 ∈ per-value()
BY
{ (BLemma `member-per-value` THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
.....wf..... 
1.  A  :  Type
2.  B  :  Type
3.  b  :  B
\mvdash{}  0  \mmember{}  per-value()


By

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Latex:
(BLemma  `member-per-value`  THEN  Reduce  0  THEN  Auto)

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