Section Distributivity.
Variable gf: rel -> rel.
Hypothesis gf_mon: monotone12 gf.

Lemma gpaco12_dist clo r rg
(CMP: wcompatible12 gf clo)
(DIST: forall r1 r2, clo (r1 \12/ r2) <12= (clo r1 \12/ clo r2)):
gpaco12 gf clo r rg <12= (paco12 gf (rclo12 clo (rg \12/ r)) \12/ rclo12 clo r).