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Step * of Lemma swap_wf

∀n:ℕ. ∀i,j:ℕn.  (swap(i;j) ∈ ℕn ⟶ ℕn)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}n:\mBbbN{}.  \mforall{}i,j:\mBbbN{}n.    (swap(i;j)  \mmember{}  \mBbbN{}n  {}\mrightarrow{}  \mBbbN{}n)


By

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Latex:
ProveWfLemma

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