Section Arg1.
Variable gf : rel1 T0 -> rel1 T0.
Arguments gf : clear implicits.

Theorem paco1_acc: forall
l r (OBG: forall rr (INC: r <1= rr) (CIH: l <1= rr), l <1= paco1 gf rr),
l <1= paco1 gf r.