Nuprl - Proof: one one corr rel vs invfuns 1 1 1 1 2 1

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: one one corr rel vs invfuns 1 1 1 1 2 1

1. A : Type
2. B : Type
3. R : A

Prop
4.

x:A.

!y:B. R(x;y)
5.

y:B.

!x:A. R(x;y)
6. f : A

B
7.

x:A. R(x;f(x))
8. g : B

A
9.

y:B. R(g(y);y)
10. x : A
11. y : B
12. R(x;y)

y = f(x)

By:	Inst: Hyp:7 Using:[x] THEN Inst: Hyp:4 Using:[x]

Generated subgoal:

1 13. R(x;f(x))
14. !y:B. R(x;y)
y = f(x)
3 steps

About:

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html