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Step * of Lemma l_sum_wf

∀[L:ℤ List]. (l_sum(L) ∈ ℤ)
BY
{ (Unfold `l_sum` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[L:\mBbbZ{}  List].  (l\_sum(L)  \mmember{}  \mBbbZ{})


By

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Latex:
(Unfold  `l\_sum`  0  THEN  Auto)

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