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Step * of Lemma equipollent-nat-squared

ℕ ~ ℕ × ℕ
BY
{ (With ⌜λn.coded-pair(n)⌝ (D 0)⋅ THEN Auto) }

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Latex:

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Latex:
\mBbbN{}  \msim{}  \mBbbN{}  \mtimes{}  \mBbbN{}


By

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Latex:
(With  \mkleeneopen{}\mlambda{}n.coded-pair(n)\mkleeneclose{}  (D  0)\mcdot{}  THEN  Auto)

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