IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
finite choice122 1. A : Type
2. k :
3. k1:.
3. k1<k 3.
3. (Q:(k1AProp).
3. ((x:k1. y:A. Q(x;y)) (f:(k1A). x:k1. Q(x;f(x))))
4. Q : kAProp
5. x:k. y:A. Q(x;y)
6. k = 0
7. f:((k-1)A). x:(k-1). Q(x;f(x))
f:(kA). x:k. Q(x;f(x))