Section Arg5_1.
Definition monotone5 T0 T1 T2 T3 T4 (gf: rel5 T0 T1 T2 T3 T4 -> rel5 T0 T1 T2 T3 T4) :=
forall x0 x1 x2 x3 x4 r r' (IN: gf r x0 x1 x2 x3 x4) (LE: r <5= r'), gf r' x0 x1 x2 x3 x4.
Variable T0 : Type.
Variable T1 : forall (x0: @T0), Type.
Variable T2 : forall (x0: @T0) (x1: @T1 x0), Type.
Variable T3 : forall (x0: @T0) (x1: @T1 x0) (x2: @T2 x0 x1), Type.
Variable T4 : forall (x0: @T0) (x1: @T1 x0) (x2: @T2 x0 x1) (x3: @T3 x0 x1 x2), Type.
Variable gf : rel5 T0 T1 T2 T3 T4 -> rel5 T0 T1 T2 T3 T4.
Arguments gf : clear implicits.

Theorem paco5_2_1_acc: forall
l r_0 r_1 (OBG: forall rr (INC: r_1 <5= rr) (CIH: l <_paco_5= rr), l <_paco_5= paco5_2_1 gf_0 gf_1 r_0 rr),
l <5= paco5_2_1 gf_0 gf_1 r_0 r_1.