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Step * of Lemma add_nat_plus

∀[i:ℕ]. ∀[j:ℕ+].  (i + j ∈ ℕ+)
BY
{ Auto' }

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Latex:

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Latex:
\mforall{}[i:\mBbbN{}].  \mforall{}[j:\mBbbN{}\msupplus{}].    (i  +  j  \mmember{}  \mBbbN{}\msupplus{})


By

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Latex:
Auto'

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