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Step * of Lemma cross-product_wf

∀[r:RngSig]. ∀[a,b:ℕ3 ⟶ |r|].  ((a x b) ∈ ℕ3 ⟶ |r|)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[r:RngSig].  \mforall{}[a,b:\mBbbN{}3  {}\mrightarrow{}  |r|].    ((a  x  b)  \mmember{}  \mBbbN{}3  {}\mrightarrow{}  |r|)


By

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Latex:
ProveWfLemma

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