Step
*
of Lemma
code-pair_wf
∀[a,b:ℕ].  (code-pair(a;b) ∈ ℕ)
BY
{ (ProveWfLemma THEN Auto') }
Latex:
Latex:
\mforall{}[a,b:\mBbbN{}].    (code-pair(a;b)  \mmember{}  \mBbbN{})
By
Latex:
(ProveWfLemma  THEN  Auto')
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