Step
*
of Lemma
poset_wf
POSet{i} ∈ 𝕌'
BY
{ ((Unfold `poset` 0) THEN Auto) }
Latex:
Latex:
POSet\{i\}  \mmember{}  \mBbbU{}'
By
Latex:
((Unfold  `poset`  0)  THEN  Auto)
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