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Step * of Lemma lcm_wf

∀[a,b:ℤ].  (lcm(a;b) ∈ ℤ)
BY
{ (ProveWfLemma THEN MemTypeCD THEN EAuto 1) }

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Latex:

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Latex:
\mforall{}[a,b:\mBbbZ{}].    (lcm(a;b)  \mmember{}  \mBbbZ{})


By

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Latex:
(ProveWfLemma  THEN  MemTypeCD  THEN  EAuto  1)

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