IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
nat not finite111112 1. n : 2. f : n 3. g : n 4. x:. g(f(x)) = x 5. y:n. f(g(y)) = y 6. (x.if x=0n else f(x-1) fi) (n+1)
7. (y.if y=n 0 else g(y)+1 fi) (n+1) 8. y : (n+1)
9. y = n 10. g(y)+1 = 0
f(g(y)+1-1) = y(n+1)
By:
Inst: y:n. f(g(y)) = yn Using:[y]
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html