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Step * of Lemma combinations_wf

∀[n,m:ℕ].  (C(n;m) ∈ ℕ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[n,m:\mBbbN{}].    (C(n;m)  \mmember{}  \mBbbN{})


By

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Latex:
ProveWfLemma

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