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Step * of Lemma fact_wf

∀[n:ℕ]. ((n)! ∈ ℕ+)
BY
{ (InductionOnNat THEN (RWO "fact_unroll" 0 THENA Auto) THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[n:\mBbbN{}].  ((n)!  \mmember{}  \mBbbN{}\msupplus{})


By

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Latex:
(InductionOnNat  THEN  (RWO  "fact\_unroll"  0  THENA  Auto)  THEN  Reduce  0  THEN  Auto)

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