IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
dep ax choice version21 1. A : Type
2. B : AType
3. Q : x:AB(x)Prop
4. x:A. y:B(x). Q(x,y)
f:(x:AB(x)). x:A. Q(x,f(x))
By:
Compute4 x:A. y:B(x). Q(x,y) * x:Ay:B(x)Q(x,y)
THEN
Rename4: g THEN Witness z.1of(g(z))
THEN
Compute (z.1of(g(z)))(x) * 1of(g(x))