IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
int ooc nat12121 1. f : 2. i:. 0if(i) = i2
3. i:. 0if(i) = (-i)2-1
4. x,y:. x2 y2-1
5. n : i:. f(i) = n
By:
Inst: Thm*a:, b:. q:, r:b. a = qb+r Using:[n | 2] THEN ExistHD Hyp:-1