IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
his sum rep wd12 1. 'a : S
2. 'b : S
3. f : hbool 'a'b hbool
4. v1:'a, v2:'b.
4. f = (b:hbool. x:'a. y:'b. (x =v1)b)
4. f = (b:hbool. x@0:'a. y:'b. (y =v2)b)
u:'a+'b. f = rep_sum(u) 'a'b