IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
At:
iter via intseg comp binop1 1. A : Type
2. f : AAA 3. u : A 4. is_commutative_sep(A; f)
5. is_ident(A; f; u)
6. is_assoc_sep(A; f)
a,b:, e,g:({a..b}A).
f((Iter(f;u) i:{a..b}. e(i)),Iter(f;u) i:{a..b}. g(i))
=
(Iter(f;u) i:{a..b}. f(e(i),g(i)))
By:
Guarding (a:<type>. <prop>)
BackThru:
Thm*P:(Prop).
Thm* (a:, b:{...a}. P(a,b))
Thm* Thm* (a:. (b:{...a}. P(a,b)) (b:{a...}. P(a,b))) (a,b:. P(a,b))
THEN
At Type (Guarding (b:<type>. <prop>) Auto)