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Step * of Lemma add-wf-bar-nat

∀[x,y:bar(ℕ)].  (x + y ∈ bar(ℕ))
BY
{ (InstLemma `add-wf-partial-nat` [] THEN Unfold `bar` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[x,y:bar(\mBbbN{})].    (x  +  y  \mmember{}  bar(\mBbbN{}))


By

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Latex:
(InstLemma  `add-wf-partial-nat`  []  THEN  Unfold  `bar`  0  THEN  Auto)

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