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Step * 1 of Lemma zero-add-base


1. x : Base
2. (x)↓
3. x ∈ ℤ
⊢ x ≤ 0 + x
BY
{ (RWO "zero-add" 0 THEN Auto) }

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Latex:

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Latex:

1.  x  :  Base
2.  (x)\mdownarrow{}
3.  x  \mmember{}  \mBbbZ{}
\mvdash{}  x  \mleq{}  0  +  x


By

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Latex:
(RWO  "zero-add"  0  THEN  Auto)

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