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Step * of Lemma multiply_nat_wf

∀[i,j:ℕ].  (i * j ∈ ℕ)
BY
{ ((UnivCD THENA Auto) THEN InstLemma `mul_bounds_1a` [⌜i⌝;⌜j⌝]⋅ THEN Auto) }

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Latex:

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Latex:
\mforall{}[i,j:\mBbbN{}].    (i  *  j  \mmember{}  \mBbbN{})


By

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Latex:
((UnivCD  THENA  Auto)  THEN  InstLemma  `mul\_bounds\_1a`  [\mkleeneopen{}i\mkleeneclose{};\mkleeneopen{}j\mkleeneclose{}]\mcdot{}  THEN  Auto)

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