Step
*
of Lemma
s-group_wf
s-Group ∈ 𝕌'
BY
{ (Unfold `s-group` 0 THEN RecordWf' THEN Auto) }
Latex:
Latex:
s-Group  \mmember{}  \mBbbU{}'
By
Latex:
(Unfold  `s-group`  0  THEN  RecordWf'  THEN  Auto)
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