IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
before-map21 1. T : Type
2. T' : Type
3. f : TT' 4. T List
5. u : T 6. v : T List
7. x',y':T'.
7. x' before y' map(f;v) (x,y:T. x before yv & f(x) = x' & f(y) = y')
8. x' : T' 9. y' : T' 10. x' = f(u) & (y' map(f;v)) x' before y' map(f;v)
x,y:T. x = u & (yv) x before yv & f(x) = x' & f(y) = y'