Section Arg5.
Variable gf : rel5 T0 T1 T2 T3 T4 -> rel5 T0 T1 T2 T3 T4.
Arguments gf : clear implicits.

Theorem paco5_acc: forall
l r (OBG: forall rr (INC: r <5= rr) (CIH: l <5= rr), l <5= paco5 gf rr),
l <5= paco5 gf r.