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Step * 1 of Lemma add-has-value-iff


1. x : partial(ℕ)
2. y : partial(ℕ)
3. (x + y)↓
⊢ (x)↓ ∧ (y)↓
BY
{ (FLemma `add-has-value-partial-nat` [-1] THEN Auto) }

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Latex:

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Latex:

1.  x  :  partial(\mBbbN{})
2.  y  :  partial(\mBbbN{})
3.  (x  +  y)\mdownarrow{}
\mvdash{}  (x)\mdownarrow{}  \mwedge{}  (y)\mdownarrow{}


By

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Latex:
(FLemma  `add-has-value-partial-nat`  [-1]  THEN  Auto)

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