Section Arg4.
Variable gf : rel4 T0 T1 T2 T3 -> rel4 T0 T1 T2 T3.
Arguments gf : clear implicits.

Theorem _paco4_acc: forall
l r (OBG: forall rr (INC: r <4== rr) (CIH: l <4== rr), l <4== paco4 gf rr),
l <4== paco4 gf r.