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At: complete nat ind with y 1 1 2 2

1. P : Prop
2. g : i:. (j:iP(j))  P(i)
3. Y(f,xg(x,f))  VoidVoid
4. n:. Y(f,xg(x,f))  (m:nP(m))
  Y(f,xg(x,f))  (i:P(i))


By: ExtWith [`r'] [VoidVoid]


Generated subgoal:

1 5. r : 
  Y((f,xg(x,f)),r P(r)

4 steps

About:
voidnatural_numberlambdaapplyfunctionycombmemberpropimpliesall
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(24steps total) PrintForm Definitions int 1 Sections StandardLIB Doc