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Step * of Lemma length_mon_for_char

∀A:Type. ∀as:A List.  (||as|| = (For{<ℤ+>} x ∈ as. 1) ∈ ℤ)
BY
{ (InductionOnList THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}A:Type.  \mforall{}as:A  List.    (||as||  =  (For\{<\mBbbZ{}+>\}  x  \mmember{}  as.  1))


By

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Latex:
(InductionOnList  THEN  Reduce  0  THEN  Auto)

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