IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
fib coprime sfa2 n:. CoPrime(fib(n),fib(n+1))
By:
SimilarTo n,k:. k = n+1 CoPrime(fib(n),fib(k))
{We rephrase the theorem to simplify the arithhmetic expressions that will arise
{in the proof. }