IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
nsub surj imp a rev inj gen113111 1. B : Type
2. e : BB 3. IsEqFun(B;e)
4. a :
5. f : aB 6. Surj(a; B; f)
7. fa onto B 8. (y,x. (f(x)) ey) B{p:(a)| i:a. p(i) }
9. (y.least x:. (f(x)) ey) Ba 10. i1 : B 11. i2 : B 12. (least x:. (f(x)) ei1) = (least x:. (f(x)) ei2)
13. f(least x:. (f(x)) ei1) = f(least x:. (f(x)) ei2)
i1 = i2