Nuprl Basics - Proof: sfa doc sexpr size wf 1 1

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At: sfa doc sexpr size wf 1 1

1. A : Type
2. Q : Sexpr(A)

Prop
3.

s:{s:Sexpr(A)| Q(s) }. Size(s)

4. s : ({s:Sexpr(A)| Q(s) }

{s:Sexpr(A)| Q(s) })+A

Size(s)

By:	Analyze-1 THENL [Analyze-1;Id] THEN Def of Cons(s1;s2) \| Inj(a)

Generated subgoals:

1 4. x1 : {s:Sexpr(A)| Q(s) }
5. x2 : {s:Sexpr(A)| Q(s) }
Size(Cons(x1;x2))
2 steps

2 4. y : A
Size(Inj(y))
1 step

About:

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1	4. x1 : {s:Sexpr(A)\| Q(s) } 5. x2 : {s:Sexpr(A)\| Q(s) } Size(Cons(x1;x2))	2 steps
2	4. y : A Size(Inj(y))	1 step