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

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At: sfa doc sexpr reverse wf 1 1

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

Prop
3.

e:{e:Sexpr(A)| Q(e) }. Reverse(e)

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

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

Reverse(e)

Sexpr(A)

By:

Analyze-1

Generated subgoals:

1 4. x1 : {e:Sexpr(A)| Q(e) }
5. x2 : {e:Sexpr(A)| Q(e) }
Reverse(Cons(x1;x2)) Sexpr(A)
3 steps

2 4. y : A
Reverse(Inj(y)) Sexpr(A)
1 step

About:

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1	4. x1 : {e:Sexpr(A)\| Q(e) } 5. x2 : {e:Sexpr(A)\| Q(e) } Reverse(Cons(x1;x2)) Sexpr(A)	3 steps
2	4. y : A Reverse(Inj(y)) Sexpr(A)	1 step