Nuprl - Proof: ooc preserves dededkind inf 1 1 2 1 1 1 1 1

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At: ooc preserves dededkind inf 1 1 2 1 1 1 1 1

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

B
4. g : B

A
5. InvFuns(A;B;f;g)
6. a : A
7. h : A

A
8. Inj(A; A; h)
9. x : B
10. f(h(g(x))) = f(a)
11. g(f(h(g(x)))) = g(f(a))
12.

x:A. g(f(x)) = x
13.

y:B. f(g(y)) = y
14. h(g(x)) = a

x:A. h(x) = a

By:	Witness: g(x)

Generated subgoals:

None

About:

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