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Step * of Lemma before_nil_lemma

∀u,a:Top.  (before(u;[]) ~ tt)
BY
{ ((UnivCD THENA Auto) THEN Unfold `before` 0 THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}u,a:Top.    (before(u;[])  \msim{}  tt)


By

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Latex:
((UnivCD  THENA  Auto)  THEN  Unfold  `before`  0  THEN  Reduce  0  THEN  Auto)

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