Section Arg6.
Variable gf : rel6 T0 T1 T2 T3 T4 T5 -> rel6 T0 T1 T2 T3 T4 T5.
Arguments gf : clear implicits.

Theorem paco6_unfold: forall (MON: monotone6 gf) r,
paco6 gf r <6= gf (upaco6 gf r).