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Step * of Lemma nat_plus_inc_int_nzero

ℕ+ ⊆r ℤ-o
BY
{ (D 0 THEN Auto) }

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Latex:

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Latex:
\mBbbN{}\msupplus{}  \msubseteq{}r  \mBbbZ{}\msupminus{}\msupzero{}


By

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Latex:
(D  0  THEN  Auto)

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