Def {i..j} == {k:| i  k < j }

is mentioned by

Thm* x:T, l:T List, i:||l||. [x / l][(i+1)] ~ l[i]	[select_cons_tl_sq]
Def increasing(f;k) == i:(k-1). f(i)<f(i+1)	[increasing]

In prior sections: int 1 bool 1 int 2 list 1

Try larger context: MarkB generic IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html