IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
l all cons3 1. T : Type
2. P : TProp
3. x : T 4. L : T List
5. P(x)
6. y:T. (yL) P(y)
7. y : T 8. (y [x / L])
P(y)
By:
RWO Thm*l:T List, a,x:T. (x [a / l]) x = a (xl) -1 THEN Analyze -1