IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
split factor1 chara1 1. k : {2...}
2. g : {2..k}
3. x : {2..k}
4. xx<k 5. x<xx & x<xx {2..k}(g) = {2..k}(split_factor1(g; x))
& split_factor1(g; x)(xx) = 0
& (u:{2..k}. xx<u split_factor1(g; x)(u) = g(u))