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Step * of Lemma code-pair_wf

∀[a,b:ℕ].  (code-pair(a;b) ∈ ℕ)
BY
{ (ProveWfLemma THEN Auto') }

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Latex:

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Latex:
\mforall{}[a,b:\mBbbN{}].    (code-pair(a;b)  \mmember{}  \mBbbN{})


By

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Latex:
(ProveWfLemma  THEN  Auto')

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