IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
surjection type surjection111221 1. A : Type
2. B : Type
3. f : AB 4. Surj(A; B; f)
5. a :
6. s : aA 7. Surj(a; A; s)
8. B Discrete
9. f o saB 10. Surj(a; B; f o s)
11. e : BB 12. x,y:B. (xey) x = y 13. b : B 14. (i.((f o s)(i)) eb) {p:(a)| i:a. p(i) }
15. (least i:. ((f o s)(i)) eb) a ((f o s)(least i:. ((f o s)(i)) eb)) eb
By:
Use:[a | p(i):= ((f o s)(i)) eb]
Inst: Thm*k:, p:{p:(k)| i:k. p(i) }. p(least i:. p(i))
THEN
Analyze THEN ReduceSOAps Concl
Generated subgoals:
None
About:
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html