IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
decidable quotient equal111111 1. T : Type
2. E : TTProp
3. EquivRel x,y:T. E(x,y)
4. f : TT 5. x,y:T. (xfy) E(x,y)
6. u1 : T 7. u2 : T 8. E(u1,u2)
f(u1) = f(u2) (x,y:T//E(x,y))