Section Distributivity.
Variable gf: rel -> rel.
Hypothesis gf_mon: monotone4 gf.

Lemma gpaco4_dist clo r rg
(CMP: wcompatible4 gf clo)
(DIST: forall r1 r2, clo (r1 \4/ r2) <4= (clo r1 \4/ clo r2)):
gpaco4 gf clo r rg <4= (paco4 gf (rclo4 clo (rg \4/ r)) \4/ rclo4 clo r).