IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
no repeats iff1 1. T : Type
2. l : T List
3. i,j:. i<||l|| j<||l|| i = jl[i] = l[j]
4. x : T 5. y : T 6. f:(||[x; y]||||l||).
6. increasing(f;||[x; y]||) & (j:||[x; y]||. [x; y][j] = l[(f(j))])
x = y
By:
ExRepD THEN InstHyp [0] -1 THEN Reduce -1 THEN InstHyp [1] -2 THEN Reduce -1