Section Arg8.
Variable gf : rel8 T0 T1 T2 T3 T4 T5 T6 T7 -> rel8 T0 T1 T2 T3 T4 T5 T6 T7.
Arguments gf : clear implicits.

Theorem paco8_unfold: forall (MON: monotone8 gf) r,
paco8 gf r <8= gf (upaco8 gf r).