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Step * of Lemma NoBallRetraction_wf

∀[n:ℕ]. (NoBallRetraction(n) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[n:\mBbbN{}].  (NoBallRetraction(n)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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