IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
reduce factorization cancel1 1. a :
2. b :
3. f : {a..b}
4. g : {a..b}
5. j : {a..b}
6. 0<f(j)
7. 0<g(j)
8. reduce_factorization(f; j) = reduce_factorization(g; j)
9. x : {a..b}
f(x) = g(x)