IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
comp preserves surj1111 1. A : Type
2. B : Type
3. C : Type
4. g : AB 5. f : BC 6. b:B. a:A. g(a) = b 7. c:C. b:B. f(b) = c 8. c : C 9. b : B 10. f(b) = c 11. a:A. g(a) = b a:A. f(g(a)) = c