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Step * of Lemma length-singleton

∀[x:Top]. (||[x]|| ~ 1)
BY
{ (Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x:Top].  (||[x]||  \msim{}  1)


By

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Latex:
(Reduce  0  THEN  Auto)

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