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Step * of Lemma fabgrp_sig_wf

∀s:DSet. (fabgrp_sig{i:l}(s) ∈ 𝕌')
BY
{ Unfold `fabgrp_sig` 0 THEN Auto }

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Latex:

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Latex:
\mforall{}s:DSet.  (fabgrp\_sig\{i:l\}(s)  \mmember{}  \mBbbU{}')


By

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Latex:
Unfold  `fabgrp\_sig`  0  THEN  Auto

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